title: Ovariectomy during gestation in the american opossum, Didelphis marsupialis virginiana.
mesh_terms: D000818:Animals; D001755:Blastocyst / Q000502:physiology; D002369:Castration; D010064:Embryo Implantation; D004971:Estrus; D005260:Female; D007743:Labor, Obstetric; D009893:Opossums / Q000502:physiology*; D009929:Organ Size; D010053:Ovary / Q000502:physiology; D011247:Pregnancy; D011270:Pregnancy, Animal; D013045:Species Specificity; D014481:United States; D014599:Uterus / Q000502:physiology