在确定分娩日期时,了解胎儿的发育程度很重要。预测胎儿体重可预知胎儿体外生活的可能性,这在分娩管理上是极为重要的。胎儿体重可根据孕妇的宫底长度,腹围值进行预测。最近,主要使用超声测定胎儿双顶径来预测新生儿体重的方法,还有用超声测定心脏体积、胸部、腹围、股骨等结合双顶径来预测。一般,仅根据体外测量孕妇的宫底长度、腹围等来评价胎儿发育程度是不够充分的。超声所测胎头双顶径与胎儿体 In determining the date of birth, to understand the degree of fetal development is very important. Predicting fetal weight predicts the likelihood of fetal life outside of the body, which is extremely important in childbirth management. Fetal weight can be based on the length of the pregnant woman’s bottom of the stomach, abdominal circumference prediction. Recently, the method of sonographic determination of fetal biparietal diameter to predict neonatal body weight has been used, as well as the prediction of cardiac volume, thorax, abdominal circumference, and femur in combination with biparietal diameter using sonography. In general, only based on in vitro measurement of pregnant women, the length of the uterus, abdominal circumference, etc. to evaluate the degree of fetal development is not sufficient. Ultrasound measured fetal biparietal diameter and fetal body