Ultrasound assessment of BPD,FL,HC,HL and the size of fetal kidney will provide basis on predicting fetal abnormal growth.

• 双顶径、头围、股骨长、肱骨长、胎肾大小等可作为衡量胎儿生长发育的参考指标 ,本研究结果可为临床监测胎儿生长发育提供科学依据