Mercer J P, Brenner W E, Bolan J C, Dingfelder J R, Edelman D A, Staurovsky L G
Int J Gynaecol Obstet. 1976;14(5):401-6. doi: 10.1002/j.1879-3479.1976.tb00074.x.
This study was conducted to evaluate (1) the feasibility and accuracy of the B-Scan technique for measuring biparietal diameter (BPD) in utero, (2) the accuracy of the B-Scan technique for predicting fetal age and weight, and (3) parameters of fetal growth in pregnancies of less than 21 weeks's gestation. Forty-one subjects underwent diagnostic ultrasonography before induction of therapeutic abortion with Prostaglandin F2alpha. Following abortion, fetal crown-to-rump length (CRL), crown-to-heel (CHL), BPD, and fetal weight were measured directly. After 13 menstrual weeks' gestation the BPD could be accurately measured by ultrasound. The relationship of BPD to gestational age and fetal weight and the indices of fetal growth as measured by the CRL and CHL were established. It is concluded that ultrasound is a useful adjuvant to clinical assessment of fetal age and weight in patients form 13 to 21 menstrual weeks' gestation.
（1）B超技术测量子宫内双顶径（BPD）的可行性和准确性；（2）B超技术预测胎儿年龄和体重的准确性；（3）妊娠小于21周时胎儿生长的参数。41名受试者在使用前列腺素F2α进行治疗性流产前接受了诊断性超声检查。流产后，直接测量胎儿顶臀长（CRL）、顶跟长（CHL）、BPD和胎儿体重。妊娠13周后，可通过超声准确测量BPD。建立了BPD与胎龄、胎儿体重以及由CRL和CHL测量的胎儿生长指标之间的关系。结论是，超声是临床评估妊娠13至21周患者胎儿年龄和体重的有用辅助手段。
