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胚胎时期羊水构成胎儿生存的外环境。羊水与胎儿和母体之间不断地进行交换。羊水交换率每小时约600毫升。因此,羊水成份的变化能反映出胎儿的生长发育及代谢情况。1972年Brock首先用羊水中甲胎蛋白(alpha-feto-Protein简称αFP)作为诊断指标,成功地诊断出早期宫内无脑儿和脊柱裂。尔后,大量资料证明:测定羊水中αFP是产前诊断某些胎儿畸形,特别是神经管缺损的有效方法。早期诊断并终止妊娠,是优生运动的重要措施,对家庭对社会都有益。
Embryonic amniotic fluid constitutes the external environment for fetal survival. Amniotic fluid and the fetus and the mother constantly exchange between. Amniotic fluid exchange rate of about 600 ml per hour. Therefore, changes in amniotic fluid composition can reflect the fetal growth and metabolism. In 1972, Brock first used amniotic fluid alpha-feto-protein (αFP) as a diagnostic indicator to successfully diagnose early intrauterine anencephaly and spina bifida. Later, a large number of data show that: Determination of amniotic fluid αFP is prenatal diagnosis of some fetal malformations, especially neural tube defects in an effective way. Early diagnosis and termination of pregnancy, is an important measure of eugenics exercise, the family are good for the community.