Studies On Techniques Used In Boer Goats Embryos Transfer And Their Affecting Factors

Through systematic studies on techniques used in Boer goats embryo transfer and their affecting factors, we have reached the following results:1 .There is no significant difference in available embryos between natural estrous donors and PGF2αinduced estrous donors(p>0.05) , but available embryos decrease significantly after super-ovulation operation by using CIDR to donors(p<0.05).2. The best season for Boer goat super-ovulation is between the middle of October and the late of November in West of Henan province. 3.The age of donor goat has no significant affection on super-ovulation. But first time induced ovulation to donor goat soon after sex maturity use adequate lower dosage of FSH.4.There is no significant difference in average ovulation rate between replicates of super-ovulation to donor goat (p>0.05) , but there is a significant difference in available embryos collected(p<0.01).5.Average available embryos from Boer goats under supplement are significantly higher than those without supplement (p<0.0l).6.Good nutrition and management is the key of pregnancy rate after embryos are transferred, lambing rate of recipients under supplement (81.8%)is significantly higher than that without supplement(73.9%).7.Time difference of estrous between donors and recipients is very important to the lambing rate of recipients,pregnancy rate at time difference of 0h,±12h is significantly higher than that of±24h(p<0.01).8.Pregnancy rate and lambing rate of the recipients transferred with 2-3 embryos are significantly higher that transferred with single embryo (p<0.01). Pregnancy rates are as follows: 64.7% (single), 75% (double), 88.8%(triple). 9.Pregnancy rate of ewes...