Studies On The Application Of Embryo Transfer In Boer Goat

The present study was cariied out to investigate the factores infecting superovulation,synchronization oestrus and pregnant rate during the process of embryo transfer in boer goat. The following results were obtained.1. The superovulating dosage of FSH (produced by Isitute of Zoology, CAS) was 10mg. The average of total collected embryos, the average of available embryos and the ratio of available embyos to total collected embryos was 16.48 + 7.28, 13.48 + 7.95 and 80.50+22.93%, respectively. It was found that FSH produced by Isitute of Zoology, CAS possessed the similar superovulating effets as Folltropin-V produced by Canada.2. The estrous rate of goat receptors within 96 hours was 77.14% and 93.28% respectively when the receptors were synchronized by use of two different experiments during autumn and winter. The estrous rate obtained from the second experiment was significiently higher than that from the first one. no significant difference existed between these two experiments in the duration of estrus of synchronized goats, it was indicated that the second experiment was better than the first one.3. The effect of superovulation was simmilar in spring as that in autumn & winter in Tianshui area. The average of total collected embryos, the average of available embryos and the ratio of available embryos to total collcted embryos was 14.89+8.25,16.22+8.42 and 89.66?5.64%, respectively- However, the onset of estrous time of synchronized goats postphoned evidently in spring compairing with that in autumn & winter. It mainly (82.59%) distributed within 84 to 120 hours after the remove of norgestrel-inpregnated intravaginal sponges. However, the duration of estrus of synchronized goats was similar in spring to that in autumn & winter.4. The pregnant rate was higher in the receptor goats transfered two to three embryos than those did one embryo; however, the survival rate of embryos declined serioursly in the recepter goats transfered two to three embryos. It was concluded that it ought to be transfer one embryo per receptor when the receptors were sufficient.