Prediction of the time of delivery by means of ultrasonic scanning between the 20th and 30th weeks of pregnancy.
D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007743:Labor, Obstetric; D011247:Pregnancy; D011262:Pregnancy Trimester, Second; D011263:Pregnancy Trimester, Third; D014463:Ultrasonography