The early diagnosis of fetal structural abnormalities.
D000013:Congenital Abnormalities / Q000175:diagnosis*; D004065:Digestive System Abnormalities; D005260:Female; D005865:Gestational Age; D006330:Heart Defects, Congenital / Q000175:diagnosis; D006801:Humans; D007668:Kidney / Q000002:abnormalities; D017880:Limb Deformities, Congenital; D008403:Mass Screening; D009436:Neural Tube Defects / Q000175:diagnosis; D011247:Pregnancy; D011296:Prenatal Diagnosis / Q000379:methods*; D014463:Ultrasonography / Q000379:methods*