Use of ultrasound in complicated pregnancies.
D000013:Congenital Abnormalities / Q000175:diagnosis / Q000209:etiology; D036861:Delivery, Obstetric; D004200:Diseases in Twins; D004899:Erythroblastosis, Fetal / Q000175:diagnosis; D005260:Female; D005315:Fetal Diseases / Q000175:diagnosis*; D005323:Fetal Monitoring; D006801:Humans; D006973:Hypertension / Q000175:diagnosis; D007743:Labor, Obstetric; D010920:Placenta / Q000503:physiopathology; D010922:Placenta Diseases / Q000175:diagnosis; D011247:Pregnancy; D011248:Pregnancy Complications / Q000175:diagnosis*; D011254:Pregnancy in Diabetics / Q000175:diagnosis; D014427:Twins; D014463:Ultrasonography