An object of the present invention is to develop a pharmaceutical composition or a food com-position that ameliorates the low birthweight of newborns and prevents the birthweight from de-creasing to a level below the average body weight (low body weight at birth) through im-provement of nutrients during pregnancy. The present invention provides an agent for preventing low birthweight comprising milk phospholipids as an active ingredient, by which the low birthweight of newborns can be prevented.本發明之一目標係發展一種醫藥組合物或食物組合物，藉由改善妊娠期間之營養來改善新生兒出生體重低及預防出生體重降低至平均體重以下(出生體重低)。本發明提供一種用於預防出生體重低之製劑，其包含乳磷脂作為活性成份，藉以預防新生兒出生體重低。
