The unborn young of a viviparous mammal, in the postembryonic period, after the major
structures have been outlined. In humans, the unborn young from the end of the eighth
week after CONCEPTION until BIRTH, as distinguished from the earlier EMBRYO, MAMMALIAN
Note publique d''information :
The anatomical parts that make up a viviparous mammalian organism in the postembryonic
period of development
Note publique d''information :
A fetus that is not delivered at the initial PARTURITION of a MULTIPLE PREGNANCY,
usually of twins in humans. The retained fetus can progress to term and result in
LIVE BIRTH
Note générale sur le champ d'application :
mammalian only; human: 3d month to term; fetus in fetu: index under FETUS /abnorm;
FETUS and PREGNANCY: Manual 18.4.3, 21.55; specialty for fetus & newborn infant =
PERINATOLOGY; lithopedion: coordinate FETUS (IM) + CALCINOSIS (IM); intrauterine surgery
goes under FETUS /surg; fetal organs & tissues in tissue & cell cultures: coordinate
FETUS + organ or tissue without qualifiers + culture term, all probably NIM