title: The effect of number of corpora lutea on the length of gestation in pigs.
mesh_terms: D000818:Animals; D002369:Castration; D003338:Corpus Luteum / Q000502:physiology*; D004967:Estrogens / Q000097:blood; D005260:Female; D008098:Litter Size; D010053:Ovary / Q000502:physiology; D011247:Pregnancy; D011270:Pregnancy, Animal; D011374:Progesterone / Q000097:blood; D013552:Swine / Q000502:physiology*
chemical_list: D004967:Estrogens; D011374:Progesterone