title: Effect of the ram on duration of oestrus in the ewe.
mesh_terms: D000818:Animals; D001522:Behavior, Animal; D004054:Diethylstilbestrol / Q000494:pharmacology; D004971:Estrus / Q000187:drug effects / Q000502:physiology*; D005260:Female; D008297:Male; D010121:Oxytocin / Q000494:pharmacology; D011247:Pregnancy; D011374:Progesterone / Q000494:pharmacology; D012098:Reproduction; D012621:Seasons; D012756:Sheep
chemical_list: D011374:Progesterone; D010121:Oxytocin; D004054:Diethylstilbestrol