title: Control of estrus and progesterone levels in heifers given intravaginal progesterone coils and injections of progesterone and estrogen.
mesh_terms: D000818:Animals; D002417:Cattle / Q000502:physiology*; D004958:Estradiol / Q000494:pharmacology*; D004971:Estrus / Q000187:drug effects*; D005260:Female; D007273:Injections, Intramuscular; D011247:Pregnancy; D011374:Progesterone / Q000008:administration & dosage / Q000097:blood / Q000494:pharmacology*; D014621:Vagina
chemical_list: D011374:Progesterone; D004958:Estradiol