Journal of International Reproductive Health/Family Planning ›› 2021, Vol. 40 ›› Issue (2): 147-152.doi: 10.12280/gjszjk.20200352

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Advances in Immune Factors of Recurrent Implantation Failure

ZHOU Yu-xi, XIE Qi-jun, SHEN Rong, LING Xiu-feng, ZHAO Chun()   

  1. Center of Reproductive Medicine, Women′s Hospital of Nanjing Medical University, Nanjing Maternity and Child Health Care Hospital, Nanjing 210004, China
  • Received:2020-06-23 Published:2021-03-15 Online:2021-03-24
  • Contact: ZHAO Chun E-mail:zhaochun2008@yeah.net

Abstract:

With the development of assisted reproductive technology, the pregnancy rate has been increasing year by year, but some patients still suffer from recurrent implantation failure (RIF). To some extent RIF is a limiting factor of the success of in vitro fertilization (IVF) or intracytoplasmic sperm injection (ICSI). The mechanism of RIF is still unclear, and common causes include the defects in embryo quality, the decreased endometrial receptivity and so on. Pregnancy is a process in which "allograft" embryos invade the endometrium. With the development of reproductive immunology, people pay more and more attention to the significant role of immune factors in RIF. The immune events in maternal-fetal interface during early pregnancy are extremely complex, involving a large number of immune cells and molecules. There is also a close relationship between the IVF/ICSI outcome and autoimmune antibody. A growing number of studies have shown that immunological factors may be the main cause of RIF with unknown causes. This article summarizes the immunological factors of RIF and the common immunotherapy for RIF.

Key words: Embryo transfer, Embryo implantation, Immune tolerance, Autoantibodies, Immunotherapy