title: The reproductive biology of prolific sheep breeds.
mesh_terms: D000818:Animals; D004702:Endocrine Glands / Q000502:physiology; D004971:Estrus; D005260:Female; D008098:Litter Size; D008297:Male; D011247:Pregnancy; D012098:Reproduction; D012756:Sheep / Q000235:genetics / Q000502:physiology*; D013737:Testis / Q000254:growth & development