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羊水量的调节机制与各种因子参与有关。羊水的产生以胎儿尿及胎儿肺泡液为主,羊水从羊膜腔除去以胎儿吞咽和膜内途径(经胎盘)为主。妊娠后三个月,胎儿尿是羊水最主要来源。足月胎儿每日产生600～800ml低张尿,影响产生胎儿尿的因子即为羊水量的调节因子。 母体轻度脱水或中等量运动使母体和胎儿的渗透压升高,抗利尿激素(AVP)分泌增多,引起胎儿尿水中的AVP起到胎儿血中AVP的贮存库作用仍有疑问。影响胎儿尿的产生及其组成的内分泌因
Amniotic fluid volume regulation mechanism and a variety of factors involved. The production of amniotic fluid to fetal urine and fetal alveolar fluid-based, amniotic fluid removed from the amniotic cavity to the fetus swallowing and membrane pathways (via the placenta) based. Three months after pregnancy, fetal urine is the most important source of amniotic fluid. Full-term fetus daily produce 600 ~ 800ml hypotonic urine, the factors that affect the production of fetal urine is the regulator of amniotic fluid volume. Maternal mild dehydration or moderate exercise increased maternal and fetal osmotic pressure, increased secretion of antidiuretic hormone (AVP), causing the AVP in fetal urine to function as a reservoir of AVP in the fetus remains questionable. Affect the formation of fetal urine and its composition of endocrine causes