Watson W J
Department of Obstetrics and Gynecology, United States Army Hospital, Berlin, Federal Republic of Germany.
J Reprod Med. 1990 Mar;35(3):247-9.
A prospective investigation was performed to determine the accuracy of fetal gender determination with ultrasound at 13-19 weeks' gestation. A determination could be made in 91 of 100 women. Factors associated with nonvisualization were maternal obesity and breech presentation. The findings on ultrasound were compared with phenotypic sex after birth. The overall accuracy of sex prediction was 92.3%; for males it was 89.5% and for females, 97.1%. Significantly fewer errors were noted as experience with gender identification increased.
进行了一项前瞻性研究，以确定在妊娠13至19周时超声诊断胎儿性别的准确性。100名女性中有91名可以做出诊断。与无法看清胎儿性别的相关因素为孕妇肥胖和臀位。将超声检查结果与出生后的表型性别进行比较。性别预测的总体准确率为92.3%；男性为89.5%，女性为97.1%。随着性别鉴定经验的增加，错误显著减少。
