Methods Study of relationship between ultrasonic measurement of fetal biparietal diameter (BPD),femur length (FL),ante-posterior trunk diameter (APTD) and transversal trunk diameter (TTD) and neonatal birthweight in 945 cases.

• 方法应用B型超声对919例孕妇的945例胎儿进行双顶径、股骨长、躯干前后径和横径测量,并根据其指标计算出所估计体重。