animals having a bony or cartilaginous skeleton with a segmented spinal column and a large brain enclosed in a skull or cranium

of or relating to a fetus

of or relating to a fetus

a blood vessel in a fetus that bypasses pulmonary circulation by connecting the pulmonary artery directly to the ascending aorta; normally closes at birth

membranous duct connecting the fetus with the placenta

of or relating to a fetus

(medicine) a grossly malformed and usually nonviable fetus

a human fetus whose weight is less than 0.5 kilogram when removed or expelled from the mother's body

an unborn child; a human fetus

a blood vessel in a fetus that bypasses pulmonary circulation by connecting the pulmonary artery directly to the ascending aorta; normally closes at birth

membranous duct connecting the fetus with the placenta