The Ultrasonographic determination of placental grading, biparietal diameter (BPD) and amniotic fluid in 377 cases at late period of pregnancy and Its value for predicting fetal maturity are studied.

• 通过377例妊娠晚期的胎盘分级、胎头双顶径(BTD)和羊水超声显象观测.；并与羊水生化测定等相对比；对其预测胎儿成熟度的价值进行了研究。