title: The seasonal nature of reproductive phenomena in the sheep. I. Variation in sensitivity to oestrogen.
mesh_terms: D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001835:Body Weight; D004958:Estradiol / Q000494:pharmacology* / Q000502:physiology; D004971:Estrus; D005260:Female; D011247:Pregnancy; D011374:Progesterone / Q000494:pharmacology; D012098:Reproduction; D012621:Seasons; D012726:Sexual Behavior, Animal; D012756:Sheep / Q000502:physiology*; D013696:Temperature
chemical_list: D011374:Progesterone; D004958:Estradiol