Natsuyama E
Am J Obstet Gynecol. 1984 Aug 1;149(7):748-57. doi: 10.1016/0002-9378(84)90116-9.
Fetal sex was sonographically determined in 1879 pregnant women between 12 and 40 weeks of gestation by obtaining transverse, frontal, and sagittal sections of the fetal lower pelvic region. The success rates of producing echoimages that were sufficient to determine fetal sex were 97.1% for both sexes (7783 correct diagnoses out of 8010 sonograms), 97.1% for males (3986/4103), and 97.1% for females (3797/3907). Postnatal confirmation of the sex of 1886 newborn infants delivered of 1879 pregnant women revealed that the rate of correct diagnosis before delivery was 99.9% (1885/1886)-100% for males (957/957) and 99.8% for females (928/929). The method of ultrasonic examination of the fetal sex reported here appears to be feasible in obstetric practice with consistent reproducibility and a high incidence of correct determinations at 12 weeks of gestation and thereafter.
通过获取胎儿下盆腔区域的横切面、额状切面和矢状切面，对1879名妊娠12至40周的孕妇进行超声检查以确定胎儿性别。产生足以确定胎儿性别的超声图像的成功率，两性均为97.1%（8010张超声图中有7783例正确诊断），男性为97.1%（4103例中的3986例），女性为97.1%（3907例中的3797例）。对1879名孕妇分娩的1886名新生儿的性别进行产后确认，结果显示分娩前的正确诊断率为99.9%（1886例中的1885例），男性为100%（957例中的957例），女性为99.8%（929例中的928例）。本文报道的超声检查胎儿性别的方法在产科实践中似乎是可行的，具有一致的可重复性，且在妊娠12周及以后正确判断的发生率很高。
