title: Nitrogen retention in pigs during the estrous cycle or pregnancy and after hysterectomy or ovariectomy.
mesh_terms: D000821:Animal Feed / Q000032:analysis; D000818:Animals; D001835:Body Weight; D002369:Castration; D004971:Estrus; D005243:Feces / Q000032:analysis; D005260:Female; D007044:Hysterectomy; D009132:Muscles / Q000033:anatomy & histology; D009584:Nitrogen / Q000032:analysis / Q000378:metabolism* / Q000652:urine; D009929:Organ Size; D010053:Ovary / Q000502:physiology* / Q000601:surgery; D011247:Pregnancy; D011270:Pregnancy, Animal; D013552:Swine / Q000378:metabolism*; D014599:Uterus / Q000502:physiology*
chemical_list: D009584:Nitrogen