本文研究了278例妊娠12～43周的羊水淀粉酶活性,发现该酶活性和孕龄、胎重有良好的一致性。淀粉酶随孕龄和胎重的增加逐渐上升,至孕龄≥38周出生体重>2,500克时酶活性急剧升高。若以酶活性>121单位/100毫升为成熟值,则无论正常妊娠或异常妊娠都可得到较正确的预测。因此认为本方法判断胎儿成熟度是比较简易可靠的。 In this paper, 278 cases of amniotic fluid amylase activity of 12 to 43 weeks of pregnancy, found that the enzyme activity and gestational age, fetal weight has a good consistency. Amylase increased with gestational age and fetal weight gradually increased to gestational age ≥38 weeks birth weight> 2,500 g, a sharp increase in enzyme activity. If the enzyme activity> 121 units / 100 ml for the mature value, regardless of normal pregnancy or abnormal pregnancy can get more accurate prediction. So that the method of fetal maturity is relatively simple and reliable.