The concept of readiness for birth.
D000818:Animals; D000831:Animals, Newborn; D005260:Female; D005333:Fetus / Q000502:physiology*; D006736:Horses / Q000502:physiology*; D008892:Milk / Q000032:analysis; D011247:Pregnancy; D013391:Sucking Behavior; D014599:Uterus / Q000502:physiology