Attempts to overcome the anti-fertility effect of intrauterine plastic spirals in the ewe.
D000109:Acetylcholine / Q000494:pharmacology; D000818:Animals; D004837:Epinephrine / Q000494:pharmacology; D004958:Estradiol / Q000494:pharmacology; D005260:Female; D005298:Fertility / Q000187:drug effects*; D007434:Intrauterine Devices / Q000662:veterinary; D010053:Ovary / Q000601:surgery; D010121:Oxytocin / Q000494:pharmacology; D010830:Physostigmine / Q000494:pharmacology; D011095:Polyethylenes; D012756:Sheep / Q000502:physiology*
D011095:Polyethylenes; D004958:Estradiol; D010121:Oxytocin; D010830:Physostigmine; D000109:Acetylcholine; D004837:Epinephrine