Roopnarinesingh S, Alexis D, Lendore R, Morris D
Obstet Gynecol. 1977 Oct;50(4):442-4.
The purpose of this study was to investigate cortisol levels in the circulation of neonates following spontaneous onset of labor. There was no significant difference of values between primigravidas and multigravidas, male and female babies, or normal and preeclamptic pregnancies. There was no significant change in mean cord plasma cortisol values with advancing gestational age, after the 33rd week. It is conceivable that spontaneous labor in humans may be preceded by a release of cortisol into the fetal circulation, and when a critical "parturient" level is reached labor becomes established.
本研究的目的是调查自然发动分娩后新生儿循环中的皮质醇水平。初产妇与经产妇、男婴与女婴、正常妊娠与先兆子痫妊娠之间的值无显著差异。第33周后，平均脐血浆皮质醇值随胎龄增加无显著变化。可以想象，人类自然分娩可能在皮质醇释放到胎儿循环之前发生，当达到临界“分娩”水平时，分娩就会开始。
