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

Through systematic studies on techniques used in sheep and 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 P0F21 induced estrous donors(p>0.05), but available embryos decrease significantly after super-ovulation operation by using CIDR to donors(p<0.05). 2. Two FSH preparations are used in sheep. and the average embryos collected from each group of donors are: 12.85? 6.99(NingBo, 1501U), 12.4?5.74(NingBo,1801U) 9.32 ?4.83(CAS. 2.5mg), 11.71 ?4.53(CAS, 3.0mg). Carefully using of the two preparations can have good results in super-ovulation. 3. The best season for sheep super-ovulation in Inner Mongolia is between the middle of September and the middle of November, the best season for Boer goat super-ovulation is between the middle of October and the Late of November. 4. Same dosages of FSH have no significant effects on Germany mutton merinos and Dorset Down(P>0.05). 5. The age of donor sheep has no significant affection on super-ovulation. First time induced ovulation to donor sheep soon after sex maturity with adequate lower dosage can reach same result as good as ewes which already have lambs. 6. There is no significant difference in average ovulation rate between replicates of super-ovulation to donor sheep (p>O.O5), but there is a significant difference in available embryos collected(p,0.01). 7. Average available embryos from sheep and Boer goats under supplement are significantly higher than those without supplement (p