Chervenak F A, Brightman R C, Thornton J, Berkowitz G S, David S
Obstet Gynecol. 1986 Feb;67(2):210-3. doi: 10.1097/00006250-198602000-00010.
The accuracy of fetal crown-rump length measurement and maternal serum human chorionic gonadotropin (hCG) concentration in the prediction of obstetric gestational age was analyzed in a study population of 77 patients for whom time of ovulation was reliably determined. Published nomograms relating maternal serum hCG concentration to gestational age were not found to be valid predictors of gestational age for the study population. Fetal crown-rump length measurement using the uncorrected regression equation of Robinson was found to give the most accurate prediction of gestational age.
在一项对77例排卵时间可可靠确定的患者的研究中，分析了胎儿头臀长测量和母体血清人绒毛膜促性腺激素（hCG）浓度在预测产科孕周方面的准确性。未发现已发表的将母体血清hCG浓度与孕周相关的列线图是该研究人群孕周的有效预测指标。发现使用罗宾逊未校正回归方程进行胎儿头臀长测量可对孕周做出最准确的预测。
