title: Proceedings: Plasms progesterone levels in non-pregnant sows showing delayed return to oestrus following mating.
mesh_terms: D000818:Animals; D003307:Copulation; D004971:Estrus; D005260:Female; D011247:Pregnancy; D011374:Progesterone / Q000097:blood*; D013552:Swine / Q000097:blood*
chemical_list: D011374:Progesterone