title: Determination of fetal sex in early pregnancy.
mesh_terms: D005260:Female; D005333:Fetus / Q000033:anatomy & histology*; D005835:Genitalia / Q000196:embryology*; D006801:Humans; D008297:Male; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D012732:Sex Determination Analysis / Q000379:methods*; D014463:Ultrasonography