title: Suckling effect on estrus and blood plasma progesterone in postpartum beef cows.
mesh_terms: D000818:Animals; D002417:Cattle / Q000502:physiology*; D004971:Estrus; D005260:Female; D007774:Lactation; D049590:Postpartum Period; D011247:Pregnancy; D011374:Progesterone / Q000097:blood*
chemical_list: D011374:Progesterone