The first drink.
D001835:Body Weight; D001942:Breast Feeding; D005215:Fasting; D005919:Glomerular Filtration Rate; D006801:Humans; D007227:Infant Nutritional Physiological Phenomena; D007231:Infant, Newborn / Q000502:physiology*; D007234:Infant, Premature / Q000502:physiology; D010686:Philosophy, Medical