Some aspects of reproductive efficiency in sheep.
D000367:Age Factors; D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D001724:Birth Weight; D001947:Breeding; D004971:Estrus; D005260:Female; D005298:Fertility; D005823:Genetics; D007774:Lactation; D008136:Longevity; D008297:Male; D011247:Pregnancy; D011272:Pregnancy, Multiple; D012098:Reproduction; D012621:Seasons; D012726:Sexual Behavior, Animal; D012756:Sheep / Q000502:physiology*