Research On The Factor Influencing The Effects Of Embryo Transfer In Suffolk Sheep

The technique of superovulation and pregnancy rate in sheep has beeninvestigated for many years, but the effects have not been very stabili-zation for many factors. Factors on'the pregnancy rate of sheep embryostransferred, superovulation to establish a set of coincidence Jilin areahighly efficient ET system. Results of the experiment indicated: Japan, New Zealand and Ningbo produce FSH being compared with each other in testingthat difference is not notable in various result index(P＞0.05), but thedifference is very big in price, entrance FSH price far exceeds domesticFSH price, therefore that Ningbo produces FSH is that the suffolk sheepsurpasses fairly good choice of ovulation is put to use in productionextension middle medicine. Repeated superovulation effect having a bitcoming down, but difference is not notable(P＞0.05), The confession thatoperation brings about experiences and observesan ovary, that fallopiantube adjoins is that lessening repeats the main cause superovulationeffect, hormone handles to repetition to superovulationeffect not havingnotable effect(P＞0.05); Best season ovulates which in Jilin area of suffolksheep at the end of September-10 month middle ten days; under transplantsan embryo, same development phase, transplants the A embryo the pregnancyrate (51.72％) to be higherthan the B embryo the pregnancy rate (36.11％), but Its difference are not notable (P＞0.05);under transplants one embryo, the same quantity embryo, morula the. transplant pregnancy rate (53.57％)is higher than blastocyst transplant the pregnancyrate (51.08％), butIts difference are not notable (P＞0.05); under the same quantity, samedevelopmentphase, the transplant embryo pregnancy rate (57.62％) is higherthan transplants an embryo the pregnancy rate (50.84％), but Its differenceare not notable (P＞0.05); Acceptor ovary bodY (1～3) the pregnancy rate is respectively 57.93％, 52.30％and 51.85％, but its pregnancy rate has notthe difference, the acceptor ovary develops only ICL institute secretionprogesterone is enough to maintain embryo's early phase development, butthe CL number is very many, may produce disadvantageous effect toacceptorpregnancy rate; The acceptor sheep CL volume effect difference big or smallto embryo transfer pregnancy rate is not notable, the big, small and medium, corresponding metoarion volume pregnancy rate is respectively (55.67％,50.31％和60.94％) (P＞0.05); the acceptor sheep the oestrus synchronizationdifference in 0,±12h,±24 pregnancies rate is. respectively 62.22％, 55.28％, 57.39％, 37.71％and 37.50％, the pregnancy rate was highest when theoestrus synchronization difference between donor andrecipient ewes was Ohand±12h; Good nutrition and management is the key of pregnancy rate afterembryos are transferred, lambingrate of recipients under supplement(62.12％) is significantly higher than that without supplement(42.53％).