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体内胚泡可能在排卵后第3或4天到达宫腔,体外受精后的胚泡一般在第3天前移植。在移植时胚泡与宫内膜发育的时期不同步是否会降低植入的可能性,目前尚无定论。此外,临床为了收集多个卵母细胞用于胚泡移植,所采取的刺激卵巢方法的继发作用也可能减少植入的机率。作者观察比较了正常未受刺激和卵巢受刺激的妇女自排卵至植入期间宫内膜活检标本的表面超微结构。选择13名做绝育或因卵管障碍不孕而入院的妇女,健康,月经周期为28～30天,年龄22～37岁。
In vivo blastocysts may reach the uterine cavity 3 or 4 days after ovulation. In vitro fertilized blastocysts are generally transplanted on day 3. It is not yet conclusive whether there will be a reduction in the chances of engraftment when the blastocyst is not synchronized with the period of endometrial development during transplantation. In addition, in order to collect multiple oocytes for blastocyst transplantation, the secondary effect of the ovarian stimulation method may also reduce the probability of implantation. The authors compared the surface ultrastructure of endometrial biopsies between women who were initially not stimulated and those who were ovarian stimulated, from ovulation to implantation. Choose 13 to do sterilization or infertility due to tubal obstruction infertility and women, health, menstrual cycle is 28 to 30 days, aged 22 to 37 years.