Collection and transfer of equine embryos.
Embryos were recovered in 39 of 47 attempts (83%) during 1979 and in 75 of 104 attempts (72%) during 1980. The mean diameters of day 8 and 9 blastocysts were 1.00 and 2.13 mm, respectively. The injection of prostaglandin F2 alpha or prostalene on day 8 or 9 after ovulation resulted in a mean interval between embryo recovery attempts of 17.7 +/- 0.3 days. Number of embryos recovered within mares did not vary significantly with repeated attempts. Following surgical transfer, 8 of 15 recipients (53%) were pregnant at 50 days after ovulation, whereas only 4 of 15 recipients (27%) were pregnant at 50 days following nonsurgical embryo transfer.
D000818:Animals; D004624:Embryo Transfer / Q000295:instrumentation / Q000379:methods / Q000662:veterinary*; D004971:Estrus; D005260:Female; D006736:Horses / Q000196:embryology / Q000502:physiology / Q000601:surgery; D010060:Ovulation; D011247:Pregnancy; D013048:Specimen Handling / Q000379:methods / Q000662:veterinary; D014599:Uterus / Q000601:surgery