Physiological factors and the early embryo.
D000818:Animals; D003338:Corpus Luteum / Q000502:physiology; D004622:Embryo, Mammalian / Q000502:physiology*; D047108:Embryonic Development; D004971:Estrus; D005260:Female; D005865:Gestational Age; D011247:Pregnancy; D011270:Pregnancy, Animal; D012756:Sheep; D014599:Uterus / Q000502:physiology*