How old is the fetus?
Izquierdo
L A
LA
Department of Obstetrics and Gynecology, University of New Mexico School of Medicine, Albuquerque 87131.
Sarto
G E
GE
D005314:Embryonic and Fetal Development; D005260:Female; D005865:Gestational Age; D006801:Humans; D011247:Pregnancy; D011261:Pregnancy Trimester, First; D011262:Pregnancy Trimester, Second; D011263:Pregnancy Trimester, Third; D016216:Ultrasonography, Prenatal