Study on the Factors Influencing Embryo Transfer in Boer Goat

In this trial,the relationship between recipients' pregnancy rate and embryo development stage,exposure time of embryos in vitro,embryo quantity were studied.The result showed that the pregnancy rate of 8~16 cell embryo was higher than that of 2~4 cell embryo(P0.05).The pregnancy rate was not influenced significantly(P0.05) by surgical person.Also the time of exposure in vitro,the site of CL and embryos transferred did not influence the pregnancy rate significantly(P0.05).But the highest pregnancy rate was achieved by the recipients transferred the embryos exposed for 0~30 min in vitro.The pregnancy rate of transferring 2 embryos was also higher than that of transferring 1 embryo(61.76% versus 45.17%,P0.05).The weight of female kids by embryo transplantation was significantly heavier than that of natural breeding(P0.01),but the other indexes such as weight of male,body height,body length,bosom circumference,death rate and sex proportion were not influenced by the technology of embryo transplantation(P0.05).