title: Estrus synchronization and subsequent fertility in dairy cattle treated with 17-alpha-ethyl-19-nortestosterone (Nilevar) and 17-alpha-ethynyl-19-nortestosterone (SC4640).
mesh_terms: D000818:Animals; D002417:Cattle; D004971:Estrus / Q000187:drug effects*; D005260:Female; D005298:Fertility / Q000187:drug effects*; D005313:Fetal Death / Q000139:chemically induced / Q000662:veterinary; D007279:Injections, Subcutaneous; D008297:Male; D009639:Norethandrolone / Q000494:pharmacology*; D009640:Norethindrone / Q000494:pharmacology*; D011247:Pregnancy; D012098:Reproduction / Q000187:drug effects*
chemical_list: D009639:Norethandrolone; D009640:Norethindrone