Field observations on four outbreaks of maternal dystocia in the Merino ewe.
D000821:Animal Feed / Q000009:adverse effects*; D000818:Animals; D004420:Dystocia / Q000209:etiology / Q000662:veterinary*; D004967:Estrogens / Q000009:adverse effects / Q000032:analysis; D005260:Female; D006109:Poaceae / Q000032:analysis; D011247:Pregnancy; D012756:Sheep; D012757:Sheep Diseases / Q000209:etiology*
D004967:Estrogens