Estimating gestational age in utero.
D000653:Amniotic Fluid / Q000032:analysis; D002508:Cephalometry; D005260:Female; D005333:Fetus / Q000033:anatomy & histology / Q000000981:diagnostic imaging / Q000378:metabolism; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D008598:Menstruation; D011247:Pregnancy; D011296:Prenatal Diagnosis; D011663:Pulmonary Surfactants / Q000032:analysis; D011859:Radiography; D012127:Respiratory Distress Syndrome, Newborn / Q000175:diagnosis / Q000378:metabolism; D014463:Ultrasonography
D011663:Pulmonary Surfactants