title: The effect of level of nutrition at two stages of pregnancy on the performance of primiparous ewes.
mesh_terms: D000824:Animal Nutritional Physiological Phenomena; D000818:Animals; D000831:Animals, Newborn; D001724:Birth Weight; D001835:Body Weight; D005260:Female; D010298:Parity; D011247:Pregnancy; D011270:Pregnancy, Animal; D012756:Sheep / Q000502:physiology*; D013997:Time Factors