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胎儿发育成熟后,即脱离母体而开始独立生活。成熟或将成熟的胎儿及其附属器自子宫排出体外的过程称为分娩。尽管近年来对于某些动物分娩生理的研究有了较大的进展,但有关促使人类分娩开始的动因则还有许多问题尚未弄清。本文拟简单介绍近年有关人类分娩机理研究的一些新进展,以期推动有关分娩机理的深入研究,并为产科临床提供某些理论基础。多年的研究已阐明,人类妊娠和分娩的生理具有某些特点。首先,人类妊娠的维持有赖于胎盘的激素,卵巢黄体大约在妊娠2个月后即无作用,
Fetal development is mature, that is, from the mother and began to live independently. Mature or mature fetus and its appendages from the uterus excreted from the process known as childbirth. Although much progress has been made in recent years on the physiology of childbirth in certain animals, there are still many questions about the motivation for initiating human childbirth. In this paper, we briefly introduce some new progress in the research of human delivery mechanism in recent years in order to promote further research on delivery mechanism and provide some theoretical basis for obstetrics and gynecology. Years of research have shown that the physiology of human pregnancy and childbirth has certain characteristics. First of all, the maintenance of human pregnancy depends on the placental hormone, corpus luteum about 2 months after pregnancy, no effect,