Artificial Insemination in Swine
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1 Artificial Insemination in Swine
2 Artificial Insemination in Swine Routinely practiced on swine farms More efficient and effective use of boars AI centers distribute semen from genetically valuable boars
3 Semen Collection Semen is usually collected when the boar mounts a phantom sow An estrous sow can also be used
4 Filtering off the Gel
5 Semen Evaluation The semen is evaluated for volume concentration motility occasionally for morphology pathogens (at boar studs)
6 Semen Extension Commercial extenders preserve the semen for 1-10 days depending their cost They are added at the same temperature as the semen
7 Semen Storage Pig semen is sensitive to temperatures <15 o C Storage temperature is o C
8 Estrous Detection Boar exposure twice daily is ideal Limit to <15 min per exposure
9 Signs of Estrus Restlessness Vocalization Vulvar reddening and swelling Erect ears Immobilization response to back pressure (definitive)
10 Optimal Time to Breed Optimal time of AI relative to estrous detection: Estrous detection: Once daily AM/PM (Best) First AI Immediately! 12 hours after the first signs of estrus. Immediately if a gilt. Second AI Third AI 18 to 24 hours after the first insemination 12 to 18 hours after the second insemination if still in estrus 18 to 24 hours after the first insemination 12 to 18 hours after the second insemination if still in estrus
11 Swine Reproductive Anatomy
12 Insemination Devices
13 Intrauterine insemination Allows for rapid insemination, use of lower doses and less stimulation of sow May cause damage to the reproductive tract
14 Preparation for Insemination Standard insemination dose is >2-3 billion live sperm in a ml dose
15 Insemination
16 Insemination
17 Questions?
18 Artificial Insemination in Dogs
19 Indications Behavioral problems that prevent mating Male inexperience Orthopedic problems Transported or frozen semen
20 Time to inseminate Breeding dogs every second day during standing estrus is satisfactory in most cases This is not optimal when breedings are limited or in cases of infertility
21 Optimal time to inseminate
22 Canine Vaginal Cytology Intermediate cells (Superficial cell) Superficial cells and anuclear squames Neutrophils and bacteria can often be seen in normal smears. Neutrophils are most numerous during early diestrus.
23 Canine Vaginal Cytology Anestrus Proestrus Estrus Diestrus
24 Optimal Time to Inseminate Test for serum progesterone levels ~every 2 days after vaginal cornification is >40-60% Progesterone level ~2 ng/ml usually coincides with the LH surge Continue to check progesterone after this level is reached to be sure it continues to rise (e.g ng/ml 2 days later)
25 Optimal Time to Inseminate Progesterone level ~2 ng/ml usually coincides with the LH surge Ovulation and oocyte maturation take another ~4 days Optimal time to breed: 3-7 days after the LH surge
26 Guidelines: Optimal time to inseminate Natural breeding 3, 5 and 7 days after the LH surge Shipped semen 4 and 6 days after the LH surge Frozen semen or limited access 5 days after the LH surge
27 Bonus Information Whelping usually occurs days after the LH surge Also days after the diestral vaginal Also days after the diestral vaginal cytology smear
28 Semen Collection
29 Semen Sample Only the sperm-rich fraction is used Prostatic fluid only added if needed to increase volume Volume of inseminate: 2-10 ml depending on size of bitch Pre-ejaculate, sperm-rich and prostatic fluid
30 Semen Sample Ideally evaluate for volume, motility, concentration and morphology Insemination dose ~200 million motile sperm Usually inseminate the entire ejaculate
31 Insemination Instruments Sheath for bovine AI guns works better than infusion pipettes Osiris catheter seals off vagina
32 Insemination Technique Sanitize vulva Raise hind end of bitch Lubricated and gloved finger to guide Lubricated and gloved finger to guide catheter Pass catheter up and over ischial arch and then cranially to cervix Inseminate slowly, followed by enough air to clear catheter
33 Insemination Technique
34 After Insemination Elevate bitch s hindquarters for 1-10 min +/- Stroke vaginal wall with a finger for ~1 minute Don t allow jumping up or squatting for another min
35 Semen Storage and Transportation Semen can be extended, cooled and shipped ~equine semen Equine semen extenders are satisfactory but extenders for canine semen are probably better Advisable to test longevity of stored sperm for stud dogs
36 Frozen Semen Fertility is variable Intrauterine insemination is essential for optimal pregnancy rates
37 Scandinavian Technique for Intrauterine Insemination
38 Endoscopic Technique for Intrauterine Insemination
39 Surgical Technique for Intrauterine Insemination
40 Questions?
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