Comprehensive Analysis on Related Factors to Human Frozen-Thawed Embryo Transfer

Assisted reproductive technology(ART) is one of the therapeutic means for infertility in modern medicine.It has broken through the natural ways and process of human reproduction,and is a revolution of reproductive medicine.The success rate of ART has been improved significantly along with the continuous optimalization of culture conditions of gametes and embryos.ART has become one of optimal treatments of infertility.Close attention is gradually being paid to frozen-thawed embryo transfer as an effectively supplymentary treatment for ART.The related factors of implantation of cryopreserved human embryo are comprehensively analyzed.It is concluded that the use of embryo freezing and thawing techniques can improve the overall pregnancy rate of the first oocyte retrieval.Freezing and recovery can reduce the rate of good quality embryos,but it has a good clinical pregnancy rate.Among all of related factors,we also cncluded that pre-cryopreservation embryo quality and age are the major factors that affect the survival rate of the frozen-thawed embryos.Choosing the good quality of the embryos to freeze can raise the survival rate.