title: The nature of dystokia in ewes after grazing oestrogenic subterranean clover.
mesh_terms: D000818:Animals; D004032:Diet; D004420:Dystocia / Q000175:diagnosis / Q000209:etiology / Q000662:veterinary*; D005260:Female; D005313:Fetal Death / Q000662:veterinary; D011247:Pregnancy; D012756:Sheep; D012757:Sheep Diseases / Q000209:etiology*