妊娠是一个非常复杂的生理过程,从免疫学的角度看类似于器官移植。携带父方异体抗原的胚胎对于母体来说是半异己的异体移植物,对接受非亲属赠卵或赠胚进行体外受精胚胎移植的不育症患者来说,则是全异己的异体移植物,但并不受母体免疫系统排斥,而是产生免疫耐受。可以设想,一旦 Pregnancy is a very complex physiological process that looks like an organ transplant from an immunological point of view. An embryo carrying a paternal alloantigen is a hemimacoterous allograft that is an allograft to an infertile patient who receives an in vitro fertilized embryo transfer from a non-relative to an egg or embryo, but is an allograft Not immune from the mother’s immune system, but to produce immune tolerance. Can imagine, once