title: Progesterone and the pregnant mare: unanswered chestnuts.
authors: W R
authors: WR
authors: Allen
mesh_terms: D000818:Animals; D005260:Female; D006736:Horses / Q000502:physiology*; D011247:Pregnancy; D011270:Pregnancy, Animal / Q000502:physiology*; D011374:Progesterone / Q000502:physiology*
chemical_list: D011374:Progesterone