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- W2016117855 abstract "To determine the feasibility and accuracy of determination of fetal gender at the 11-13 week obstetric sonogram. A prospective observational study was carried out. Consecutive patients attending for routine screening at 11-13 weeks were invited to participate. Two dimensional grayscale ultrasound was performed. Gestational age, crown-rump length, and fetal position were recorded. The angle of the genital tubercle was observed. Prediction of fetal gender was made, both from the angle of the genital tubercle and the impression of an experienced sonologist. Post-natal correlation of fetal gender was determined. 138 cases were included. Fetal gender was predicted in all cases. There were 82 males (59%) and 56 (41%) females in the study. Post-natal evaluation confirmed the prediction in 128 cases (93%). Accuracy of predication was related to the gestational age: at 11 weeks, there was 62% accuracy, which increased to 93% at 12 weeks and 100% from 13 weeks onwards. In the ten cases where the prediction was incorrect, 9 were male incorrectly predicted to be female and one was a female incorrectly predicted to be male. Post-hoc analysis of these nine males showed that they were all in the supine position, which may have affected clear visualization of the genital tubercle. All the incorrect predictions occurred at a crown-rump length of less than 650mm. Fetal gender can be predicted with 93% accuracy from 12 weeks′ gestation onwards. The systematic error encountered in our study in identifying male fetuses in the supine position appears to only be significant at gestations under 13 weeks and at crown-rump lengths of less than 650mm." @default.
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- W2016117855 title "674: Fetal gender determination at the 11 to 13 week sonogram" @default.
- W2016117855 doi "https://doi.org/10.1016/j.ajog.2008.09.704" @default.
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