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胎儿与胎盘是由一个孕卵发育起来的,有共同的循环系,具备一个单元的功能。如超过非孕期数百倍的母体雌激素量,是胎儿副肾皮质增加分泌的脱氢表雄酮(DHEA),受胎盘芳香化作用而产生的,因此,得出胎儿胎盘单元一个整体概念。胎盘担负维护妊娠,并具有物质的交换、吸收、排泄、贮藏、合成、分解等功能,圆满地协助母体养育胎儿。已经研究各种检查法,不仅求知胎儿先天性疾病、畸形与胎儿发育、成熟程度,尚要查清胎盘功能(特别是储备力)来加强胎儿管理。希望对所有孕妇都能定期检查是最理想,但由于人力条件限制只能根据适应症有目的地选用必要的检查法。现概述如下:
Fetal and placenta are developed from a pregnant egg, a common circulation, with a unit function. If more than non-pregnant women hundreds of times the amount of maternal estrogen, the fetus is an increase in the secretion of renal cortex DHEA (DHEA), by the placenta aromatization effect, therefore, to come to an overall concept of fetal placenta. The placenta is responsible for the maintenance of pregnancy, and has the functions of exchanging, absorbing, excreting, storing, synthesizing and decomposing substances, and assists the mother to raise the fetus satisfactorily. Various studies have been studied, not only to identify fetal congenital diseases, deformities and fetal development, maturity, but also to check the placental function (especially reserve) to strengthen fetal management. I hope all pregnant women can be regularly checked is the best, but because of manpower constraints can only be selected according to indications purposeful examination method. Now summarized as follows: