ARTIFICIAL INSEMINATION IN FARM ANIMALS - Phenix-Vet

66Artificial Insemination in Farm Animalsinsemination 48h later (Figure 4). However, scheduling for the artificial inseminations maybe slightly adjusted according to the experience of the operator, the place for semendeposition and the limitation on the number of inseminations. Consequently, regimes forcanine AI may vary with authors (Root Kustritz, 2003). Table 8 condenses the availableinformation on the AI schedules for fresh, chilled and frozen semen.Fig. 4. Graphic representation of the fertile period and the ideal moment for canine AIaccording to the type of semen.SemenDosisExpectedspzsurvivalInsemination scheduleExpectedfertilityFresh150-200x10 6spz/mL(extended)4-6 days- Every other day, when P 4rise above 4ng/mL, up to3 times.- Day 1 to 4 post-ovulation- P 4 levels between 8 and15ng/mL- 80-90%(either withtranscervicalor vaginaldeposition)Chilled150 - 200x10 6spz/mL(extended)24-72hrs- Breeding once or twice 2-4 days post ovulation(P 4 = 4 -10ng/mL).- Day 2 to 4 post-ovulation- P 4 levels between 8 and15ng/mL- 80-90%(either withtranscervicalor vaginaldeposition)Frozen50 - 300x10 6spz/mL(extended)12-24hrs.- Twice, at P 4 levels above8ng/mL and estrusvaginal cytology- Day 5 to 7 post-ovulation- P 4 levels between 18 and28 ng/mL- 45% if vaginaldeposition- 67 -84% iftranscervicalor intrauterineTable 8. Artificial insemination schedules for dogs, according to the type of semen used.