Physiological factors affecting frequency and rate of lambing.
D000818:Animals; D004971:Estrus / Q000187:drug effects; D005260:Female; D005298:Fertility / Q000502:physiology*; D008525:Medroxyprogesterone / Q000494:pharmacology; D010060:Ovulation; D011247:Pregnancy; D011270:Pregnancy, Animal / Q000502:physiology*; D011372:Progestins / Q000494:pharmacology; D012098:Reproduction / Q000502:physiology*; D012621:Seasons; D012756:Sheep / Q000502:physiology*
D011372:Progestins; D008525:Medroxyprogesterone