Indications for ultrasonography in obstetrics.
D005260:Female; D005317:Fetal Growth Retardation / Q000175:diagnosis*; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D009774:Obstetrics; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D014463:Ultrasonography