00, 5957a, anatomical, anatomically, between, carbon, co, co-2, co2, cord, cords, dioxide, enlargement, exchange, exh5957a, fetal, fetus, gas, gyn, gynecological, gynecology, healthy, labels, lining, loa, mother, o2, ob, ob-gyn, ob/gyn, obstetric, obstetrical, obstetrics, occurs, orientation, orientations, oxygen, placenta, placental, position, positions, pregnancies, pregnancy, pregnant, reproduction, reproductive, show, shows, systems, umbilical, umbilicus, us, uteral, uteri, uterine, utero, uterus, womb, wombs, 1, 2, 3600