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动物实验表明宫内节育器(IUD)干扰生育过程,但它在人类的作用方式尚未完全了解。一般认为IUD极大地改变子宫内膜腔细胞和生化环境,使胚胎在着床期死亡。胚胎在进入宫腔前往往发育正常,死亡前将到达宫腔,且在此处停留一些时间。作者阐述了以下三个问题:1.在血和尿中检测胚胎所产生的特殊物质。2.孕卵在女性生殖道的移行。3.涉及从生殖道回收卵子的镜下特征。作者首先论
Animal experiments show that IUD interferes with fertility but its role in humans is not fully understood. Generally believed that IUD greatly changes the endometrial cells and the biochemical environment, the embryo died during implantation. The embryo tends to develop normally before entering the uterine cavity and will reach the uterine cavity before death and stay there for some time. The author addresses the following three questions: 1. The detection of specific substances produced by embryos in blood and urine. Pregnant eggs in the female reproductive tract migration. 3. Involves the recovery of the egg from the reproductive tract, the mirror features. The author first discusses