Twin pregnancy: maternal-fetal nutrition.
D002149:Energy Intake; D005260:Female; D005333:Fetus / Q000502:physiology*; D006128:Growth; D006266:Health Education; D006801:Humans; D007231:Infant, Newborn; D009730:Nursing Assessment; D009747:Nutritional Physiological Phenomena; D009751:Nutritional Requirements; D009773:Obstetric Nursing; D011247:Pregnancy; D011272:Pregnancy, Multiple; D012306:Risk; D014427:Twins