title: Observations on dystocia in a Romney flock.
mesh_terms: D000818:Animals; D001724:Birth Weight; D004420:Dystocia / Q000453:epidemiology / Q000662:veterinary*; D005260:Female; D008297:Male; D009520:New Zealand; D010298:Parity; D011247:Pregnancy; D012756:Sheep; D012757:Sheep Diseases / Q000453:epidemiology*