Ultrasonics in diagnosis (Sonar).
D005260:Female; D005831:Genital Diseases, Female / Q000175:diagnosis; D005865:Gestational Age; D006801:Humans; D006828:Hydatidiform Mole / Q000175:diagnosis; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis*; D014427:Twins; D014463:Ultrasonography