title: First trimester fetal sexing in pregnancy at risk for Duchenne muscular dystrophy.
mesh_terms: D000293:Adolescent; D002824:Chorionic Villi / Q000648:ultrastructure*; D005260:Female; D006801:Humans; D009136:Muscular Dystrophies / Q000175:diagnosis*; D010920:Placenta / Q000648:ultrastructure*; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011296:Prenatal Diagnosis; D012732:Sex Determination Analysis