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To obtain the learning curve in determining fetal sex with the first trimester ultrasound scan.A prospective study was conducted on 400 pregnant patients to determine the fetal sex by ultrasound scan between 11–13+6 weeks of gestation. A midsagittal plane of the fetus was obtained by two sonographers who were newly trained for measuring nuchal translucency. It would be assigned as male if the fetal...
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