<;P>;PROBLEM TO BE SOLVED: To provide a medicine for administration to a pregnant woman not only having a premature delivery-preventing effect but also inhibiting the lung inflammation of a fetus, frequently developing as a complication to the premature delivery and also having less adverse effects. <;P>;SOLUTION: This medicine for administration to the pregnant woman is provided by containing &ge;1 kind of a polypeptide of a thioredoxin family and/or its inducing agent as an active ingredient, and having the preventive effect of the premature delivery and an anti-inflammatory effect to the lung of the fetus. <;P>;COPYRIGHT: (C)2010,JPO&INPIT