DISORDERS OF SEX DEVELOPMENT (SDS): NEW CONCEPTS, AND CLINICAL MANAGEMENT
|
|
- Cameron Rich
- 6 years ago
- Views:
Transcription
1 DISORDERS OF SEX DEVELOPMENT (SDS): NEW CONCEPTS, AND CLINICAL MANAGEMENT Gabriela Guercio, Mariana Costanzo, Alicia Belgorosky y Marco A. Rivarola Servicio de Endocrinología, Hospital de Pediatria Garrahan, Buenos Aires, Argentina INTRODUCTION The disorders of sex development constitute a serious and complex clinical problem requiring the participation of a multidisciplinary team for adequate management of urgencies and long-term follow up In recent years, the advancement of molecular genetics has generated important advances in our knowledge of these disorders. A landmark in this subject has been the publication of a Consensus Statement, in 2006, of the Consensus Meeting on Management of Intersex Disorders (Chicago, 2005) [1], containing main discussions and recommendations. This Statement contains the following sessions: Nomenclature and Definitions, Investigations and Management of DSD, Outcome, Future Studies, Role of Supports Groups and Legal Issues. One of the recommendations is a change in the nomenclature (Table 1). TABLE 1. Changes in nomenclature proposed by the Chicago Consensus PREVIOUS NAME NEW NAME Intersex Male Pseudohermaphrodite Female Pseudohermaphrodite Trae Hermaphrodite XX male Disorders of sex development (DSD) 46,XY DSD 46,XX DSD ovotesticular DSD 46,XY complete gonadal dysgenesis 46,XX testicular DSD Mechanisms of human normal sex differentiation. A comprehensive knowledge of normal sex determination and differentiation is essential for understanding of its disorders [2]. Determination of sex chromosome constitution, 46, XY or 46,XX, defines gonad differentiation (testis or ovary, respectively). Subsequent sex differentiation defines the type of internal and external genitalia by developing of original primordial. In postnatal life, psychological differentiation is completed. Notwithstanding differences in sex chromosome constitution,
2 sex organ primordial are undistinguishable in the two sexes for several weeks. From there on gonads are differentiated (Figure 1, see Spanish version), followed by internal and external genitalia. Embryological origin of the main cellular types of the gonads are shown in Figure 2, (see Spanish version). Precursor Sertoli cells (testis) and granullosa cells (ovary) are derived from the same mesenchymal precursor cell. An initial important event is the migration of primordial germ cells from th middle line (hindgut) to urogenital ridge bilaterally, to be transformed into gonocytes. In the urogenital ridge, a steroidogenic precursor cell (to later develop into Leydig cells in the testis and theca cells in the ovary) also becomes differentiated. Finally, in the surrounding connective tissue differentiation of precursor peritubular myoid cells takes place. These cells will grow around seminiferous cords in the testis or around follicles in the ovary [3, 4]. Primordial germ cells proliferate by mitosis during migration This division is arrested when arriving to the male gonad, but it initiates meiotic division in the ovary, without completing it [3, 4]. In figure 3 (see Spanish version), main s and hormones participating in the process of sex differentiation are shown. Testicular differentiation. [1-3]. In the primitive bisexual gonad, testicular differentiation starts earlier (7 th week) than in the ovary (10 th week). Early differentiation in the bisexual primitive gonad is modulated by many transcription s, such as WT-1, Lhx9 and SF-1. The last one, encoded by a gene (NF5B) located at chromosome 9p33, is essential in adrenal, pituitary, hypothalamic and gonadal differentiation. It also regulates the expression of steroidogenic enzymes, ACTH receptor, AMH and AMH receptor [5]. The SRY gene, located in the short arm of the Y chromosome, is central in testicular differentiation. The SRY protein is expressed in Sertoli and germ cells. It is a transcription necessary to induce the cascade of events leading to testicular differentiation [6, 7]. This process however has multiple stimulating and inhibiting s which, when altered, generate different types of testicular dysgenesis. SOX9, ATRX, FGF9/FGFR2, Gata4/Fog2, Pod1, Vanine, Nexine, DHH, DHH receptor, Patched2, NGF, HGF, PDGF, Pod1, Pdgfr, M33, and Ir/Igfr1/Irr have been described as participating s [1-3]. Mechanisms of differentiation of non germ cells are summarized in figure 4 (see Spanish version). Promordial testis differentiation is induced by SRY through SOX9 action. SOX9 gene, located in chromosome 17q24, transcribes a transcription protein [7]. Another protein, DAX-1 would have inhibitory effects on SF-1 and SOX9. DAX-1 gene is locatedin chromosome Xp21. On the other hand, another protein, Wnt4, a growth, stimulates DAX-1 and inhibits Leydig cell differentiation [7, 8]. These modulators of testicular differentiation are dose dependent, i. e., both deficiency as well as excess of stimulation or inhibition determines final effect. Recent advances in molecular genetics have help to understand many aspects of this complex differentiation process, but many aspects remain without definition. Testis development implies the differentiation of fetal Leydig, peritubular myioid and pre-sertoli cells. The latter surround seminiferous cords containing germ cells. Fetal Leydig cells secrete testosterone, necessary for male gonaduct and male external genitalia differentiation; and Insl3 (insulinlike3 peptide necessary for the first stage of testicular descent [9]. Moreover, Sertoli cells secrete AMH necessary for regression of ipsi-lateral Müller ducts, preventing then differentiation of Fallopian ducts an the uterus [10]. The main players of the process of testis differentiation are shown in Figura 5 (see Spanish version Ovarian differentiation. [1-4] It has been proponed that the delay in ovarian differentiation depends on chromosome X double dose. However, little molecular information is available on the initial stages of ovarian differentiation. The most remarkable characteristic of ovarian development is the exponential increment in mitoses of germ cells. Early in embryonic life, around the 11 th week, 46,XX gonocytes mature into oogonia and star meiotic division in intrauterine life (in contrast with spermatogonia which star meiosis at puberty).
3 However, ovarian meiotic division is not completed, being arrested at the diplotene prophase of the first meiotic division. Proliferation of follicles start at week 16 th, but different from testis, endocrine activity i scarce during fetal life since estrogens are not necessary for differentiation of internal nor external genitalia. Expression of aromatase, FSH and LH receptors are late in prenatal life. This suggests that ovarian development is fetal gonadotropin independent, as indicated by normal ovarian development in the anencephalus fetus and in LH receptor inactivating mutations. Wnt4 is required for ovarian differentiation including germ cells. Germ cells are necessary for follicle formation. FOXL2, CBX2 and RSPO1 are s necessary for follicular development and for suppression of testicular development in 46,XX embryos [1-4]. See Figure 6, Spanish version. Defects in many of the s involved in the process of sex determination and differentiation are responsible for different types of gonadal dysgenesis, both in humans and in mouse models (Table 2). Differentiation of Gonaducts. Regardless of chromosome constitution, in the absence of functional testes, Müllerian ducts are differentiated, under Wnt4 stimulation, in fallopian ducts, uterus and the upper third of the vagina. As mentioned earlier, Sertoli cells of the fetal testis secrete AMH to inhibit ipsilateral Müller ducts, probabl by local diffusion, between the 9 th and the 12 th weeks. This effect is mediated by AMH specific membrane receptor. On the other hand, Fetal Leydig cells secrete testosterone to induce ipsilateral differentiation of Wolff ducts into epididymis and vas deferens. Differentiation of External Genitalia. Similarly, regardless of chromosome constitution, in the absence of functional testes or circulatin androgens of another origin, external genitalia conformation is feminine. Circulating testosterone reaches external genitalia and the prostrate to induce masculinization between the 8 th and 13 th week. However, testosterone acts as a pre-hormone and it needs to be converted into dihydrotestoterone, by 5α-reductase enzyme, to induce complete masculinization. This mechanism requires ligand binding to the androgen receptor to be able to stimulate specific genes. The androgen receptor has 8 exons and it is located in chromosome Xq The protein has 919 aa and the characteristic structure of steroid hormone receptors. This receptor is a ligand-dependent transcription with higher affinity for dihydrotestosterone than for testosterone. The androgen receptor-dihydrotestosterone complex binds DNA as homodimer to activate transcription of androgen dependent genes. Testicular descent into the scrotum. Testicular descent into the scrotum, which takes place during the third trimester of pregnancy, completes sex differentiation in males. This process can be divided in two stages: 1, trans-abdominal migration and 2, inguino-scrotal descent. Trans-abdominal migration is facilitated by the cranial suspensory ligament (induced by testosterone) which keeps the testis fixed to the posterior abdominal wall, and by the gubernaculums testis, stimulated by the insulin-like 3 peptide (Insl3), which attaches the inferior testicular pole to bottom of the scrotum. Insl3 acts through the so-called GREAT (G proteincoupled receptor affecting testis descent) receptor. During stage 1, testes are taken to the internal inguina orifice. The final descent to the scrotum is mediated by the gubernaculum retraction stimulated by testosterone. Prenatal and/or perinatal brain sexualization. There is considerably controversy regarding a possible effect of androgens on pre or perinatal brain programming of male sexual identity in adult life. For analysis it is convenient to consider separately sexual behavior and sexual identity [12]. Information arising from experimental animals, as well as data collected from patients disorders of sex development point out to role for prenatal programming in sexual behavior and identity. In our opinion, this is a to be considered, but not a decisive one for sex assignment.
4 Table 2. Gene Function Abnormality in the murine model Abnormal Human Phenotype WT1 Urogenital ridge blockade Denys Drash, WARG, Frasier SF1 Lhx9 Urogenital ridge blockade Urogenital ridge blockade Variable testicular dysgenesis with and without adrenal insufficiency Emx2 Urogenital ridge blockade CBX2 Gonadal dysgenesis Gata4/Fog2 co Sry inhibition, SRY SOX9, XX sex reversal (GF) Camptomyelic dysplasia, XX sex reversal (GF) Sox8 with Sox9 hypofunction Fgf9 Signaling molecule DAX1 Nuclear co- Cord formation and Espermatogenesis impairment. XY sex reversal Hypogonadism and adrenal hypoplasia. XX sex reversal (GF) Pod1 DHH Pdgfr Arx ATRX Pax2 DMRT1 WNT4 RSPO1 Signaling molecule Receptor Helicase Signaling molecule Growth Leydig cell differentiation impairment Mesonephric cell differentiation impairment Abnormal testicular differentiation Mesonephric cell differentiation impairment Absence of Sertoli and germ cells Agenesia de ductos mullerianos, XX sexr reversal XY Dysgenesis with or without polyneuropathy. X-linked Lisencephalia, XY DSD Alpha-thalassemia, X-linked mental retardation, XY DSD (GF) XX sex reversal Gene defects described refer to loss-of-function mutations, unless indicated (GF: gain of function mutation). Modified from Wilhelm D et al, Sex Determination and Gonadal Development in Mammals, Physiol Rev 87:1 28, 2007 (11)
5 Postnatal activation of the testis (minipuberty). In the 70s, Forest et al. [13] described that serum concentration of testosterone has a transient strong increment during the second and third months of postnatal life, to decrease later to very low values. Recently, increments in serum concentration of inhibin B and AMH [14], two Sertoli cell secreted products, have also been reported to be elevated. The effects of this postnatal activation of the testis are not well understood. Experimental evidence in monkeys suggests that this activation would have important effects for adult sex life, for instance, for brain maturation that is very active at this age. Postnatal gonadotrophic activation is also seen in females. DEFINITIONS AND NOMENCLATURE Ambiguous genitalia are referred to those genital disorders that alter the complete female or male phenotype. Sex discordance refers to a dissociation between chromosomal sex (XX, XY), gonadal sex (testis, ovary), gonaducts and external genitalia (masculine, feminine). It can co-exist or not with ambiguous genitalia, for instance, in complete androgen insensitivity syndrome where external genitalia are completely feminine. Traditionally, terms such as intersex and ambiguous genitalia, has been mainly used to define genital anomalies in newborns. Furthermore, due to the complexity of these disorders multiple classifications have been used. Some terms, such as pseudohermaphroditism, hermaphroditism, intersex, are controversial. They might be perceived as pejorative, confusing and stigmatizing for parents and patients [15]. For these reason, the Chicago Consensus for the management of DSD discussed the more controversial and critical points providing recommendations and remarking aspects requiring future research [16, 17]. However, some of the new recommendations are difficult to implement. When possible, terms should be descriptive and precise (i. e., androgen insensitivity syndrome), it should reflex genetic etiology and accommodate phenotypic variations. As a goal, terminology should be unanimously utilized by professionals and patients. The study of the karyotype is necessary for using the new classification. An approximation to etiologic diagnosis is central for the process of decision making. However, decisions might be difficult and under the pressure of urgency in the context of time-consuming diagnostic studies. Recent advances in molecular diagnosis have helped in the understanding many of these disorders. However, a precise molecular diagnosis is reached in less than 20% of DSD [16]. Even though defining of karyotype is essential in many cases, sometime, as in congenital adrenal hyperplasia (CAH), clinical information and hormone determinations are enough to make a diagnosis. Moreover, since some patients with CAH have a life-threatening sodium loss, this is the most urgent diagnosis to be made. In this context, the neonate weight curve is an important clinical information. In all newborns with ambiguous genitalia and no palpable gonads, serum electrolytes and 17-hydroxyprogesterone are urgent determinations. It has to be kept in mind that serum electrolytes might be normal during the first days of life and that the upper limit of normal serum 17-hydroxyprogestrerone is higher than later in life, particularly in premature birth. Later studies will confirm the presence of a CIP21B gene mutation. SPECIFIC CLINICAL EXAMINATION
6 It is important to interrogate about possible affected members in the family: siblings with ambiguous genitalia, male precocious puberty or sudden and unexplained death early in life (possibility of acute adrenal insufficiency), or other affected members in the mother s family, such as amenorrheic aunts or grand aunts (androgen insensitivity syndrome). Questioning about pregnancy is also important: ingestion of androgenic steroids or signs of virilization in the mother during pregnancy. After birth, general health, feeding and thriving of the child should be recorded. Table 3. Classification of Disorders of sex development, DSD, as proposed by the Consensus Statement [1]. Sex Chromosome DSD DSD 46,XY DSD 46,XX 45,X (Turner Syndrome and variants) 47,XXY (Klinefelter Syndrome and variants) 45,X/46,XY (mixed gonadal dysgenesis, ovotesticular DSD) 46,XX/46,XY (chimeric, ovotesticular DSD ) Disorders of gonadal (testicular) development: 1) Complete gonadal dysgenesis (Swyer Syndrome) 2) Parcial gonadal dysgenesis 3) Gonadal regression 4) Ovotesticular DSD 5) CBX2 gene def. (ovaries + fem. ext. gen.) Disorders of androgen synthesis or action: 1) Androgen biosynthesis defects ( 17-hydroxylase, 5αRD2, StAR protein, 3β-HSD, 17β-HSD) 2) Defects in androgen actions ( CAIS, PAIS) 3) Defects in LH receptor (Leydig cell hypoplasia) 4) Defects in AMH or AMH receptor (Persistence Müllerian ducts syndrome) Other (cloacal extrophy, severe hypospadias) Disorders of gonadal (ovarian) development: 1) Ovotesticular DSD 2) Testicular DSD (SRY +, duplication of SOX9), 46,XX males. Def. gen 3) Gonadal dysgenesis Androgen excess: 1) Fetal (Defects in 21-hydroxilase, or 11-hydroxylase) 2) Fetoplacental (deficiencia de aromatasa, POR [P450 oxidoreductasa]) 3) Maternal (luteoma, exogenous androgens, etc) Other (cloacal extrophy, vaginal atresia, other)
7 Physical examination of genitalia should follow a systematic order. Starting from the middle line, characteristics of the phallus, size (length, diameter), curvature, urethral opening, erections should be registered; as well as of the scrotum and/or labia majora (labio-scrotal folds); genital openings and genital skin pigmentation. Finally, a careful palpation looking for gonads including inguinal canals is of paramount importance. The location, size, and firmness of the two gonads, or the absence of them should be registered. The neonatal findings suggesting a DSD are the following [16, 17]: - Overt of genital ambiguity. - Apparent female genitalia with an enlarged clitoris, posterior labial fusion, or an inguinal or labial mass. - Apparent male genitalia with bilateral undescended testes, micropenis, isolated perineal hypospadias. - A family history of DSD - A discordance between genital appearance ans pre-natal karyotype. In newborns, complete masculinization without palpable gonads (Figure 8, see Spanish version) and complete feminization with bilateral hernias require a karyotype to discard complete masculinization in 46,XX CAH and complete feminization in 46,XY CAIS, respectively. In general, initial studies are karyotype withdetection of SRY by FISH, serum electrolytes, serum 17-hydroxyprogesterone, gonadotropins, testosterone, AMH [16-18], and pelvic US. Depending on initial diagnostic orientation, other hormonal determinations (eg., serum DHT), and hcg or ACTH tests are useful. Occasionally, laparoscopy and gonadal biopsy are necessary for a precise diagnosis. Finally, a gene analysis can provide the etiologic diagnostic. CLASSIFICATION OF DSD Since the last Chicago Convention the recommended classification is based on sex chromosome constitution. This is better than a classification based on gonad characteristics because frequently there is no gonadal biopsy available. On this basis, there are 3 main categories: 1, 46,XX DSD, 2, 46,XY DSD, 3 Abnormal Sex chromosome DSD (Table 3 and Figure 8, Spanish version). MANAGEMENT OF DSD A newborn with ambiguous genitalia is a classical urgency in pediatric endocrinology. A fluid communication between the medical team and the family is essential in these circumstances. A strict confidentiality and respect for family privacy in the context of a great anxiety and suffering are also important. An institutional medical should take over management in these cases. Unfortunately, the specialist is not the first physician in charge, but initial management and disclosure of information are important in these critical problem. Decision about sex becomes urgent after the first examination. Since in many instances this is not clear and it requires additional studies, parents need to make an effort to be patient and it is important that they find support for the management of these situations. The medical team should be careful with the use of words, such as testes or ovaries or a define sex before enough information is gathered. Frequently, the geneticist informs the karyotype in terms of feminine or masculine instead of 46,XX or 46,XY, which might generate confusion among family members. Psychological damage should be minimized. Finally, it is important to remember that adrenal insufficiency has to be ruled out [16-18].
8 The newborn with ambiguous genitalia is frequently referred to a high complexity Health Center. Depending on local Institutional organization, members of the DSD Team include a pediatric endocrinologist, a geneticist, a surgeon with experience in pediatric genital malformations, a pediatric urologist, a psychologist, an image specialist, a pediatrician and a lawyer with experience in legal sex assignment. In our group, the pediatric endocrinologist coordinates the group and it interacts with family members to discuss decisions. LEGAL AND SOCIAL SEX ASSINGMENT Due to the complexity of the causes of DSD, briefly discussed above, in many instances it is necessary to assign sex without a precise etiologic diagnosis. However, an approximation to diagnosis is essential. The medical team in charge of sex assignment needs to have rules for functioning. Decisions should be made by consensus, after group discussions. In case of disagreements, documents should be added to clinical charts, and opinions and justifications for decisions should be written down and signed. Surgeons have strong legal responsibilities, therefore, their points of view are essential. Clinical follow up is in the hands of the pediatric endocrinologist and the surgeon. Psychological support is often needed for long periods of time. Infants have the right to benefit from appropriate decisions, taken at the appropriate time, on their behalf, by their parents. The Medical Team recommends but parents or patients, depending on age, decide. Three age periods can be distinguished in the problem of sex assignment: 1. The newborn period, extended to early infancy, when parents decide 2. From 2 to 10 years of age, when sex re-assignment is not recommended 3. From 11 years of age up to late adolescence or young adulthood, when patients decide. When sex assignment becomes necessary, particularly in newborns, the aim is to choose that sex that will allow the best future functional adaptation that better goes along with the biological sex. Decisions might be difficult and controversial because in some cases there is no good solution. In general recommendations in infants are based on: 1) Etiologic diagnosis (if available, molecular diagnosis), diagnosis of type of DSD is useful because disorder evolution partially depends on etiology, known from both personal experiences and scientific publications. 2) Development of external genitalia and potential future sex function, 3) Possibility of surgical correction, 4) Development of internal genitalia, and fertility potential, 5) Paternal acceptance, 6) Psychological evaluation of parents and family, including social environment. Prenatal programming of central nervous system by androgens has little influence on decisions. Understanding the social and cultural background of the family is crucial for a fruitful relationship between parents and doctors. However, it is sometimes difficult to coordinate (or avoid) delivery of information to parents by different members of the team. Special efforts should be made by the informing professional to ensure appropriate understanding by the family of the situation, including chromosomal constitution, gene function, heredity, gonadal development, as well as external and internal genitalia differentiation. This often requires a previous explanation of normal biological development. Words should be selected carefully avoiding misunderstandings and offensive interpretations. It is advisable to frequently stop explanations in order to ask parents (or patients) to explain in their own words what they have understood so far.
9 Moreover, during follow up patients will go through all stages of growth and development (from infancy to adulthood) and information has to be delivered according to patient mental developing and understanding. The medical team has to be permanently alert with new developments that might arise along many years, and to give answers to questions, which are frequently, influenced by a high emotional impact. Corrective surgery arises many questions: Feminization surgery. In the correction of clitoromegalia and urogenital sinus it is important to preserve erectile function. Frequently postnatal surgery is a first step requiring some degree of vaginoplastia in later life. Vaginal dilatation is not recommended before full estrogenization and imminent sexual activity. Masculinization surgery. Urethral and ventral cord reconstruction might be facilitated with a reasonable use of testosterone. Re-operation because of fistulae is common. It is important to recognize that there are serious difficulties for penile reconstruction. Gonadectomy. Dysgenetic gonads of 46,XY DSD subjects have high risk of developing gonadoblastoma and are frequently removed. Therefore, scrotal gonads of subjects raised as males might be retained, but require periodic check up with clinical examination and US imaging for early detection of abnormal masses. The age of gonadectomy in CAIS is matter of debate. Since tumor development in these gonad is rare before puberty, it has been recommended to postpone gonadectomy to late adolescence to allow for spontaneous breast development. However, the psychological burden of carrying two testes for a girl has to be considered and time of gonadectomy should be discussed with the parents (and the patient after a certain age). IN SUMMARY, PATIENTS WITH DSD SHOULD RECIEVE LONG-TERM CARE PROVIDED BY MULTIDISCIPLINARY TEAMS IN CENTERS OF EXCELLENCE WITH AMPLE EXPERIENCE IN THIS CLINICAL MANAGEMNET. However, members of any team should be aware that errors can be made, therefore, decisions should be carefully thought, and discussed, before final recommendation. REFERENCES See Spanish version.
AMBIGUOUS GENITALIA. Dr. HAKIMI, SpAK. Dr. MELDA DELIANA, SpAK
AMBIGUOUS GENITALIA (DISORDERS OF SEXUAL DEVELOPMENT) Dr. HAKIMI, SpAK Dr. MELDA DELIANA, SpAK Dr. SISKA MAYASARI LUBIS, SpA Pediatric Endocrinology division USU/H. ADAM MALIK HOSPITAL 1 INTRODUCTION Normal
More informationIN SUMMARY HST 071 NORMAL & ABNORMAL SEXUAL DIFFERENTIATION Fetal Sex Differentiation Postnatal Diagnosis and Management of Intersex Abnormalities
Harvard-MIT Division of Health Sciences and Technology HST.071: Human Reproductive Biology Course Director: Professor Henry Klapholz IN SUMMARY HST 071 Title: Fetal Sex Differentiation Postnatal Diagnosis
More informationW.S. O University of Hong Kong
W.S. O University of Hong Kong Development of the Genital System 1. Sexual differentiation 2. Differentiation of the gonads a. Germ cells extragonadal in origin b. Genital ridge intermediate mesoderm consisting
More informationDEVELOPMENT (DSD) 1 4 DISORDERS OF SEX
Wit JM, Ranke MB, Kelnar CJH (eds): ESPE classification of paediatric endocrine diagnosis. 4. Disorders of sex development (DSD). Horm Res 2007;68(suppl 2):21 24 ESPE Code Diagnosis OMIM ICD 10 4 DISORDERS
More informationApproach to Disorders of Sex Development (DSD)
Approach to Disorders of Sex Development (DSD) Old name: The Approach to Intersex Disorders Dr. Abdulmoein Al-Agha, FRCP Ass. Professor & Consultant Pediatric Endocrinologist, KAUH, Erfan Hospital & Ibn
More informationDEFINITION: Masculinization of external genitalia in patients with normal 46XX karyotype.
INTERSEX DISORDERS DEFINITION: Masculinization of external genitalia in patients with normal 46XX karyotype. - Degree of masculinization variable: - mild clitoromegaly - complete fusion of labia folds
More informationPHYSIOLOGY AND PATHOLOGY OF SEXUAL DIFFERENTIATION
PHYSIOLOGY AND PATHOLOGY OF SEXUAL DIFFERENTIATION Prof. Dr med. Jolanta Słowikowska-Hilczer Department of Andrology and Reproductive Endocrinology Medical University of Łódź, Poland Sexual determination
More informationGoals. Disorders of Sex Development (Intersex): An Overview. Joshua May, MD Pediatric Endocrinology
Disorders of Sex Development (Intersex): An Overview Joshua May, MD Pediatric Endocrinology Murphy, et al., J Ped Adol Gynecol, 2011 Goals Objectives: Participants will be able to: 1. Apply the medical
More informationChapter 18 Development. Sexual Differentiation
Chapter 18 Development Sexual Differentiation There Are Many Levels of Sex Determination Chromosomal Sex Gonadal Sex Internal Sex Organs External Sex Organs Brain Sex Gender Identity Gender Preference
More informationIntersex Genital Mutilations in ICD-10 Zwischengeschlecht.org / StopIGM.org 2014 (v2.1)
Intersex Genital Mutilations in ICD-10 Zwischengeschlecht.org / StopIGM.org 2014 (v2.1) ICD-10 Codes and Descriptions: http://apps.who.int/classifications/icd10/browse/2010/en 1. Reference: 17 Most Common
More informationDevelopment of the female Reproductive System. Dr. Susheela Rani
Development of the female Reproductive System Dr. Susheela Rani Genital System Gonads Internal genitals External genitals Determining sex chronology of events Genetic sex Determined at fertilization Gonadal
More informationDevelopment of the Genital System
Development of the Genital System Professor Alfred Cuschieri Department of Anatomy University of Malta The mesonephros develops primitive nephrotomes draining into a mesonephric duct nephrotome mesonephric
More informationManagement of gonads in DSD
Management of gonads in DSD Martine Cools, paediatric endocrinologist, Katja Wolffenbuttel and Piet Hoebeke, paediatric urologists, all at University Hospital Ghent, Belgium Sten Drop, paediatric endocrinologist
More informationC. Patrick Shahan, MD University of Tennessee Health Science Center Department of Surgery
C. Patrick Shahan, MD University of Tennessee Health Science Center Department of Surgery Drop use of hermaphrodite and derivatives 1 in 15,000 live births Congenital Adrenal Hyperplasia Mixed Gonadal
More informationDAX1, testes development role 7, 8 DFFRY, spermatogenesis role 49 DMRT genes, male sex differentiation role 15
Subject Index N-Acetylcysteine, sperm quality effects 71 Ambiguous genitalia, origins 1, 2 Anti-Müllerian hormone function 13 receptors 13 Sertoli cell secretion 10, 38 Apoptosis assays in testes 73, 74
More informationWhen testes make no testosterone: Identifying a rare cause of 46, XY female phenotype in adulthood
When testes make no testosterone: Identifying a rare cause of 46, XY female phenotype in adulthood Gardner DG, Shoback D. Greenspan's Basic & Clinical Endocrinology, 10e; 2017 Sira Korpaisarn, MD Endocrinology
More informationSexual Development. 6 Stages of Development
6 Sexual Development 6 Stages of Development Development passes through distinct stages, the first of which is fertilization, when one sperm enters one ovum. To enter an ovum, a sperm must undergo the
More informationOVOTESTIS Background Pathophysiology
OVOTESTIS Background Ovotestis refers to the histology of a gonad that contains both ovarian follicles and testicular tubular elements. Such gonads are found exclusively in people with ovotesticular disorder
More information1) Intersexuality - Dr. Huda
1) Intersexuality - Dr. Huda DSD (Disorders of sex development) occur when there is disruption of either: Gonadal differentiation Fetal sex steroid production or action Mullerian abnormalities and Wolffian
More informationCase Based Urology Learning Program
Case Based Urology Learning Program Resident s Corner: UROLOGY Case Number 3 CBULP 2011 019 Case Based Urology Learning Program Editor: Associate Editors: Manager: Case Contributors: Steven C. Campbell,
More informationDisordered Sex Differentiation Mixed gonadal dysgenesis Congenital adrenal hyperplasia Mixed gonadal dysgenesis
Disordered Sex Differentiation DSD has superceded intersex in describing genital anomalies in childhood DSD results from hormonal imbalances due to (i) abnormal genetic status, (ii) enzyme defects, or
More informationLet s Talk About Hormones!
Let s Talk About Hormones! This lesson was created by Serena Reves and Nichelle Penney, with materials from the BCTF and The Pride Education Network. Hormones are responsible for the regulation of many
More informationPlease Take Seats by Gender as Shown Leave Three Seats Empty in the Middle
Please Take Seats by Gender as Shown Leave Three Seats Empty in the Middle Women Men Sexual Differentiation & Development Neal G. Simon, Ph.D. Professor Dept. of Biological Sciences Signaling Cascade &
More informationBiology of Reproduction-Biol 326
Biology of Reproduction-Biol 326 READ ALL INSTRUCTIONS CAREFULLY. ANSWER ALL THE QUESTIONS ON THE ANSWER SHEET. THE ANSWER ON THE ANSWER SHEET IS YOUR OFFICIAL ANSWER REGARDLESS OF WHAT YOU MARK ON THE
More informationSex Determination and Development of Reproductive Organs
Sex Determination and Development of Reproductive Organs Sex determination The SRY + gene is necessary and probably sufficient for testis development The earliest sexual difference appears in the gonad
More information11. SEXUAL DIFFERENTIATION. Germinal cells, gonocytes. Indifferent stage INDIFFERENT STAGE
11. SEXUAL DIFFERENTIATION INDIFFERENT STAGE Early in pregnancy, (within 10-15 % of the pregnancy s expected length) a genital ridge is formed in the sides of the embryonic tissue, ventral to the mesonephros
More information10. Development of genital system. Gonads. Genital ducts. External genitalia.
10. Development of genital system. Gonads. Genital ducts. External genitalia. Gonads, genital ducts and the external genital organs initially pass through an indifferent period of development, which is
More informationSex chromosomes and sex determination
Sex chromosomes and sex determination History (1) 1940-ties Alfred Jost embryo-surgical experiments on gonads gonadal sex; male gonadal sex presence of testes; female gonadal sex lack of testes. History
More informationDisorders of gonadal and sexual development
Disorders of gonadal and sexual development gonadal embryogenesis, cytogenetics/molecular abnormalities, and clinical aspects Pr I.Maystadt 08/01/2016 IPG Male Genitalia bladder prostate penis Seminal
More informationIntersex is a group of conditions where there is a discrepancy between the external genitals and the internal genitals (the testes and ovaries).
Intersex to use the sharing features on this page, please enable JavaScript. Share on facebookshare on IwitterBookmark & SharePrintcr-lnendly version Intersex is a group of conditions where
More informationFLASH CARDS. Kalat s Book Chapter 11 Alphabetical
FLASH CARDS www.biologicalpsych.com Kalat s Book Chapter 11 Alphabetical alpha-fetoprotein alpha-fetoprotein Alpha-Fetal Protein (AFP) or alpha-1- fetoprotein. During a prenatal sensitive period, estradiol
More informationThe Biology of Sex: How We Become Male or Female.
The Biology of Sex: How We Become Male or Female. Dr. Tamatha Barbeau, Dept. of Biology Guest Lecture for Gender 200 March 2017 Objectives: 1. Sex vs. Gender defined. 2. Biological sex based on inheritance
More informationAnimal Science 434 Reproductive Physiology
Animal Science 434 Reproductive Physiology Development of the Pituitary Gland Lec 5: Embryogenesis of the Pituitary and Sexual Development Stomodeum Brain Infundibulum Rathke s Pouch Germ Cell Migration
More informationEmbryology /organogenesis/ Week 4 Development and teratology of reproductive system.
Embryology /organogenesis/ Week 4 Development and teratology of reproductive system. Male or female sex is determined by spermatozoon Y in the moment of fertilization SRY gene, on the short arm of the
More informationMaldescended testis in Adults. Dr. BG GAUDJI Urologist STEVE BIKO ACADEMIC HOSPITAL
Maldescended testis in Adults Dr. BG GAUDJI Urologist STEVE BIKO ACADEMIC HOSPITAL Definitions Cryptorchid: testis neither resides nor can be manipulated into the scrotum Ectopic: aberrant course Retractile:
More informationCh 20: Reproduction. Keypoints: Human Chromosomes Gametogenesis Fertilization Early development Parturition
Ch 20: Reproduction Keypoints: Human Chromosomes Gametogenesis Fertilization Early development Parturition SLOs Contrast mitosis/meiosis, haploid/diploid, autosomes/sex chromosomes. Outline the hormonal
More informationBiology of Reproduction- Zool 346 Exam 2
Biology of Reproduction- Zool 346 Exam 2 ANSWER ALL THE QUESTIONS ON THE ANSWER SHEET. THE ANSWER ON THE ANSWER SHEET IS YOUR OFFICIAL ANSWER. Some critical words are boldfaced. This exam is 7 pages long.
More informationDevelopment of the urogenital system
Development of the urogenital system Location of the pronephros, mesonephros and metanephros Differentiation of the intermedierm mesoderm into nephrotome and mesonephric tubules Connection between aorta
More informationSCHOOL OF MEDICINE AND HEALTH SCIENCES DIVISION OF BASIC MEDICAL SCIENCES DISCIPLINE OF BIOCHEMISTRY & MOLECULAR BIOLOGY
1 SCHOOL OF MEDICINE AND HEALTH SCIENCES DIVISION OF BASIC MEDICAL SCIENCES DISCIPLINE OF BIOCHEMISTRY & MOLECULAR BIOLOGY PBL SEMINAR: SEX HORMONES PART 1 An Overview What are steroid hormones? Steroid
More informationBios 90/95. Jennifer Swann, PhD
Sexual Differentiation Fall 2007 Bios 90/95 Jennifer Swann, PhD Dept Biol Sci, Lehigh University Why have sexes? What determines sex? Environment Genetics Hormones What causes these differences? The true
More informationSexual differentiation:
Abnormal Development of Female Genitalia Dr. Maryam Fetal development of gonads, external genitalia, Mullerian ducts and Wolffian ducts can be disrupted at a variety of points, leading to a wide range
More informationAnimal Science 434 Reproductive Physiology"
Animal Science 434 Reproductive Physiology" Embryogenesis of the Pituitary and Sexual Development: Part A Development of the Pituitary Gland" Infundibulum" Brain" Rathke s Pouch" Stomodeum" Germ Cell Migration"
More informationDISORDERS OF MALE GENITALS
Wit JM, Ranke MB, Kelnar CJH (eds): ESPE classification of paediatric endocrine diagnosis. 9. Testicular disorders/disorders of male genitals. Horm Res 2007;68(suppl 2):63 66 ESPE Code Diagnosis OMIM ICD10
More informationMohammad Sha ban. Basheq Jehad. Hamzah Nakhleh
11 Mohammad Sha ban Basheq Jehad Hamzah Nakhleh Physiology of the reproductive system In physiology, we are concerned with the mechanisms in which the system functions, and how the system responds to different
More informationSISTEMA REPRODUCTOR (LA IDEA FIJA) Copyright 2004 Pearson Education, Inc., publishing as Benjamin Cummings
SISTEMA REPRODUCTOR (LA IDEA FIJA) How male and female reproductive systems differentiate The reproductive organs and how they work How gametes are produced and fertilized Pregnancy, stages of development,
More informationAmbiguous genitalia: An approach to its diagnosis
Ambiguous genitalia: An approach to its diagnosis Poster No.: C-2828 Congress: ECR 2010 Type: Topic: Scientific Exhibit Pediatric Authors: E. Doménech Abellán, C. Serrano García, A. Gilabert Úbeda, F.
More informationNormal and Abnormal Development of the Genital Tract. Dr.Raghad Abdul-Halim
Normal and Abnormal Development of the Genital Tract Dr.Raghad Abdul-Halim objectives: Revision of embryology. Clinical presentation, investigations and clinical significance of most common developmental
More informationChapter 16: Steroid Hormones (Lecture 17)
Chapter 16: Steroid Hormones (Lecture 17) A) 21 or fewer carbon atoms B) Precursor: 27 carbon cholesterol C) major classes of steroid hormones 1) progestagens a) progesterone- prepares lining of uterus
More informationSex differentiation to puberty. Introduction
ex to puberty exual in general: chromosomal, gonadal and phenotypic sex, endocrine control of phenotypic, role of testicular hormones in male development, disorders of sexual 30 Hypothalamic sexual : sexual
More informationUrinary system development. Male ( ) and Female ( ) Reproductive Systems Development
Urinary system development Male ( ) and Female ( ) Reproductive Systems Development Urogenital system develops from mesodermal uro-genital ridge (intermediate mesoderm) development of male and female genital
More informationTo General Embryology Dr: Azza Zaki
Introduction To General Embryology The Human Development is a continuous process that begins when an ovum from a female is fertilized by a sperm from a male. Cell division, growth and differentiation transform
More informationAmbiguous genitalia (Disorders of sex development); is any case in which the external genitalia do not appear completely male or completely female.
Ambiguous genitalia (Disorders of sex development); is any case in which the external genitalia do not appear completely male or completely female. Disorders of sex development (DSD); True hermaphrodite;
More informationMartin Ritzén. bioscience explained Vol 7 No 2. Girl or boy: What guides gender development and how can this be a problem within
Martin Ritzén Professor emeritus, Karolinska Institutet, Stockholm, Sweden Girl or boy: What guides gender development and how can this be a problem within sport? Introduction During the 2009 athletics
More informationClinical European study on the outcome of hormone therapies, surgery and psychological support in disorders/variations of sex development (DSD)
Clinical European study on the outcome of hormone therapies, surgery and psychological support in disorders/variations of sex development (DSD) B. Köhler, W. Arlt, C. Bouvattier, P. Chatelain, H. Claahsen-van
More informationSexual Differentiation Fall 2008 Bios 90
Sexual Differentiation Fall 2008 Bios 90 Jennifer Swann, Professor Dept Biol Sci, Lehigh University Asexual reproduction Budding : offspring develop as a growth on the body of the parent jellyfishes, echinoderms,
More informationUrogenital System. PUMC Dept. of Anat. Hist. & Embry. 钱晓菁 XIAO-JING QIAN Dept. of Anatomy, Histology & Embryology Peking Union Medical College
Urogenital System 钱晓菁 XIAO-JING QIAN Dept. of Anatomy, Histology & Embryology Peking Union Medical College intermediate mesoderm urogenital ridge mesonephric ridge genital ridge I. Urinary System 1. kidney
More informationState of the art review in gonadal dysgenesis: challenges in diagnosis and management
McCann-Crosby et al. International Journal of Pediatric Endocrinology 2014, 2014:4 PES REVIEW State of the art review in gonadal dysgenesis: challenges in diagnosis and management Open Access Bonnie McCann-Crosby
More informationUCL. Gerard Conway. Treatment of AIS patients in multidisciplinary teams in UK. Tratamiento del SIA en equipos multidisciplinares en el Reino Unido
UCL Treatment of AIS patients in multidisciplinary teams in UK Tratamiento del SIA en equipos multidisciplinares en el Reino Unido Gerard Conway London, UK University College London Hospitals University
More informationREPRODUCCIÓN. La idea fija. Copyright 2004 Pearson Education, Inc., publishing as Benjamin Cummings
REPRODUCCIÓN La idea fija How male and female reproductive systems differentiate The reproductive organs and how they work How gametes are produced and fertilized Pregnancy, stages of development, birth
More informationSexual Reproduction. For most diploid eukaryotes, sexual reproduction is the only mechanism resulting in new members of a species.
Sex Determination Sexual Reproduction For most diploid eukaryotes, sexual reproduction is the only mechanism resulting in new members of a species. Meiosis in the sexual organs of parents produces haploid
More informationHearing on SJR13 -- Proposes to amend the Nevada Constitution by repealing the limitation on the recognition of marriage.
Written statement of Lauren A. Scott- Executive Director Equality Nevada. 1350 Freeport Blvd, #107 Sparks, Nevada 89431 Testimony and Statement for the Record of Hearing on SJR13 -- Proposes to amend the
More informationDisorders of Sexual Development
Disorders of Sexual Development 22 nd KSOGA Panel Discussion 8 November 2011 1 Disorders of Sexual Development and Differentiation DSD 8 November 2011 2 CONFUSION Disorders of SEX development 8 November
More informationChapter 46 ~ Animal Reproduction
Chapter 46 ~ Animal Reproduction Overview Asexual (one parent) fission (parent separation) budding (corals) fragmentation & regeneration (inverts) parthenogenesis Sexual (fusion of haploid gametes) gametes
More informationIB 140 Midterm #1 PRACTICE EXAM (lecture topics 1-5)
IB 140 Midterm #1 PRACTICE EXAM (lecture topics 1-5) For all the questions on this exam, the correct answer is the single best answer that is available in the answer key. 1) Which of the following is NOT
More informationDisorders of Sex Development
Disorders of Sex Development An Integrated Approach to Management Bearbeitet von, Garry L. Warne, Sonia R. Grover 1. Auflage 2012. Buch. XV, 311 S. Hardcover ISBN 978 3 642 22963 3 Format (B x L): 0 x
More informationHormones of brain-testicular axis
(Hormone Function) Hormones of brain-testicular axis anterior pituitary drives changes during puberty controlled by GnRH from hypothalamus begins to secrete FSH, LH LH targets interstitial endocrinocytes
More informationSexual differentiation is sequential process:
Genital lsystem J. H. Lue Sexual differentiation is sequential process:.genetic (chromosomal) sex -- determined at fertilization.gonad sex -- is differentiated after 7th week.phenotypic sex -- under normal
More informationunder its influence, male development occurs; in its absence, female development is established.
Sex differentiation is a complex process that involves many genes, including some that are autosomal. The key to sexual dimorphism is the Y chromosome, which contains the testis determining gene called
More informationSexual Differentiation. Physiological Psychology PSYC370 Thomas E. Van Cantfort, Ph.D. Sexual Differentiation. Sexual Differentiation (continued)
Physiological Psychology PSYC370 Thomas E. Van Cantfort, Ph.D. Sexual Differentiation Sexual Differentiation Reproductive behavior constitute the most important category of social behavior, Ú because without
More informationAction of reproductive hormones through the life span 9/22/99
Action of reproductive hormones through the life span Do reproductive hormones affect the life span? One hypothesis about the rate of aging asserts that there is selective pressure for either high rate
More informationWhy Sex??? Advantages: It limits harmful mutations Asexual: all offspring get all mutations. Sexual: There is a random distribution of mutations.
Reproduction Why sex??? Why Sex??? Asexual reproduction is quicker, easier, and produces more offspring per individual. Bacteria do it. Dandelions do it. Unisexual whiptail lizards do it. With sexual reproduction
More informationReproductive physiology. About this Chapter. Case introduction. The brain directs reproduction 2010/6/29. The Male Reproductive System
Section Ⅻ Reproductive physiology Ming-jie Wang E-Mail: mjwang@shmu.edu.cn About this Chapter The reproductive organs and how they work the major endocrine functions of sexual glands actions of sex hormones
More informationLaura Stewart, MD, FRCPC Clinical Associate Professor Division of Pediatric Endocrinology University of British Columbia
Precocious Puberty Laura Stewart, MD, FRCPC Clinical Associate Professor Division of Pediatric Endocrinology University of British Columbia Faculty Disclosure Faculty: Laura Stewart No relationships with
More informationChapter 7 DEVELOPMENT AND SEX DETERMINATION
Chapter 7 DEVELOPMENT AND SEX DETERMINATION Chapter Summary The male and female reproductive systems produce the sperm and eggs, and promote their meeting and fusion, which results in a fertilized egg.
More informationGender identity, gender assignment and reassignment in individuals with disorders of sex development: a major of dilemma
DOI 10.1007/s40618-016-0482-0 REVIEW Gender identity, gender assignment and reassignment in individuals with disorders of sex development: a major of dilemma A. D. Fisher 1 J. Ristori 1 E. Fanni 1 G. Castellini
More informationObjectives: 1. Review male & female reproductive anatomy 2. Gametogenesis & steroidogenesis 3. Reproductive problems
CH. 15 - REPRODUCTIVE SYSTEM Objectives: 1. Review male & female reproductive anatomy 2. Gametogenesis & steroidogenesis 3. Reproductive problems 3. Male Reproductive anatomy and physiology. Testes = paired
More informationReproduction. AMH Anti-Müllerian Hormone. Analyte Information
Reproduction AMH Anti-Müllerian Hormone Analyte Information - 1-2011-01-11 AMH Anti-Müllerian Hormone Introduction Anti-Müllerian Hormone (AMH) is a glycoprotein dimer composed of two 72 kda monomers 1.
More informationFemale with 46, XY karyotype
Case Report Obstet Gynecol Sci 2017;60(4):378-382 https://doi.org/10.5468/ogs.2017.60.4.378 pissn 2287-8572 eissn 2287-8580 Female with 46, XY karyotype Eun Jung Jung 1, Do Hwa Im 1, Yong Hee Park 1, Jung
More informationMore than meets the eye
More than meets the eye Ana Paula Abreu, MD, PhD American Association of Clinical Endocrinologists New England Chapter Annual Meeting September 8, 2018 Disclosures No conflict of interest or significant
More information2. Which of the following factors does not contribute to ion selectivity?
General Biology Summer 2014 Exam II Sample Answers 1. Which of the following is TRUE about a neuron at rest? A. The cytosol is positive relative to the outside B. Na+ concentrations are higher inside C.
More informationHearing on SJR13 -- Proposes to amend the Nevada Constitution by repealing the limitation on the recognition of marriage.
Written statement of Lauren A. Scott- Executive Director Equality Nevada 1350 Freeport Blvd, #107 Sparks, Nevada 89431 Testimony and Statement for the Record of Hearing on SJR13 -- Proposes to amend the
More informationBiology of gender Sex chromosomes determine gonadal sex (testis-determining factor)
Indifferent ducts of embryo Biology of gender Sex chromosomes determine gonadal sex (testis-determining factor) Y chromosome present Y chromosome absent Phenotypic sex is depends on development of external
More informationBiology of gender Sex chromosomes determine gonadal sex (testis-determining factor)
Indifferent ducts of embryo Y chromosome present Y chromosome absent Male Female penis ovary uterus vagina testis Biology of gender Sex chromosomes determine gonadal sex (testis-determining factor) Phenotypic
More informationControversies in the Management of Ambiguous Genitalia
A4 Controversies in the Management of Ambiguous Genitalia Jorge J. Daaboul, MD Medical Director Florida Center for Pediatric Endocrinology, Diabetes and Metabolism Orlando, FL The speaker has signed a
More informationChapter 22 The Reproductive System (I)
Chapter 22 The Reproductive System (I) An Overview of Reproductive Physiology o The Male Reproductive System o The Female Reproductive System 22.1 Reproductive System Overview Reproductive system = all
More information46,XY disorders of sex development (DSD)
Clinical Endocrinology (2009) 70, 173 187 doi: 10.1111/j.1365-2265.2008.03392.x CLINICAL PRACTICE UPDATE Blackwell Publishing Ltd 46,XY disorders of sex development (DSD) Berenice Bilharinho Mendonca,
More information172 Subject Index. Aromatase deficiency (cont.) paracrine and intracrine actions, 19 severe estrogen deficiency, 21 variations, 22
Subject Index A ACTH-induced hypertension, 111 112 Androgen insensitivity syndrome (AIS), 63 androgen receptor (AR), 59 bone mineral apparent density (BMAD), 60 61 CAIS subjects, 59 61 estradiol levels,
More informationTopics for this lecture: Sex determination Sexual differentiation Sex differences in behavior and CNS development. 1) organizational effects of
Topics for this lecture: Sex determination Sexual differentiation Sex differences in behavior and CNS development. 1) organizational effects of gonadal steroids on CNS development 2) our model system:
More information- production of two types of gametes -- fused at fertilization to form zygote
Male reproductive system I. Sexual reproduction -- overview - production of two types of gametes -- fused at fertilization to form zygote - promotes genetic variety among members of a species -- each offspring
More informationBIOL 2402 Reproductive Systems!
Dr. Chris Doumen! Female Reproductive Anatomy BIOL 2402 Reproductive Systems! Establishing the Ovarian Cycle During childhood, until puberty Ovaries grow and secrete small amounts of estrogens Estrogen
More informationMedical management of Intersex disorders. Dr. Abdulmoein Al-Agha, Ass. Professor & Consultant Pediatric Endocrinologist KAAUH, Jeddah
Medical management of Intersex disorders Dr. Abdulmoein Al-Agha, Ass. Professor & Consultant Pediatric Endocrinologist KAAUH, Jeddah Is it a boy or a girl? The birth of an intersex infant is often viewed
More informationReproductive Endocrinology. Isabel Hwang Department of Physiology Faculty of Medicine University of Hong Kong Hong Kong May2007
Reproductive Endocrinology Isabel Hwang Department of Physiology Faculty of Medicine University of Hong Kong Hong Kong May2007 isabelss@hkucc.hku.hk A 3-hormone chain of command controls reproduction with
More informationOutline. Male Reproductive System Testes and Sperm Hormonal Regulation
Outline Male Reproductive System Testes and Sperm Hormonal Regulation Female Reproductive System Genital Tract Hormonal Levels Uterine Cycle Fertilization and Pregnancy Control of Reproduction Infertility
More informationT o discover that there is uncertainty
LEADING ARTICLE 401 Determination of sex... Early assessment of ambiguous genitalia A L Ogilvy-Stuart, C E Brain... A multidisciplinary problem T o discover that there is uncertainty about the sex of one
More informationAMBIGUOUS GENITALIA & CONGENITAL ADRENALHYPERPLASIA
AMBIGUOUS GENITALIA & CONGENITAL ADRENALHYPERPLASIA BY Dr Numair Ali sheikh FCPS PGT I Department Of Pediatrics BBH RWP AMBIGUOUS GENITALIA Children born with ambiguous genitalia may be subdivided in to
More informationDisclosure. Session Objectives. I have no actual or potential conflict of interest in relation to this program/presentation.
46, XY Female: A Case of Complete Androgen Insensitivity Syndrome (CAIS) MICHELLE MCLOUGHLINMSN, CRNP, CPNP-AC THE CHILDREN S HOSPITAL OF PHILADELPHIA DIVISION OF ENDOCRINOLOGY AND DIABETES Disclosure
More information2. Which male target tissues respond to testosterone, and which require dihydrotestosterone?
308 PHYSIOLOGY CASES AND PROBLEMS Case 56 Male Pseudohermaphroditism: Sa-Reductase Deficiency Fourteen years ago, Wally and Wanda Garvey, who live in rural North Carolina, had their first child. The baby
More informationSex Differentiation. Course Outline. Topic #! Topic lecture! Silverthorn! Membranes (pre-requisite material)!!
Sex Differentiation The goal of these lectures is to discuss how a control system is formed. For this, we will use basic physiology associated with the control of reproduction (from sexual differentiation
More informationA National Model of Care for Paediatric Healthcare Services in Ireland Chapter 28: Paediatric Gynaecology
A National Model of Care for Paediatric Healthcare Services in Ireland Chapter 28: Paediatric Gynaecology Clinical Strategy and Programmes Division Table of Contents 28.0 Introduction 2 28.1 Current Service
More informationClinical Standards for Service Planning in PAG
The British Society for Paediatric & Adolescent Gynaecology. Clinical Standards for Service Planning in PAG Introduction The management of young children and adolescents with gynaecological problems (aged
More information