Women with an inadequate weight gain during pregnancy are at higher risk of giving birth to an infant with what?

The correct answer is - intrauterine growth restriction.

Explanation:

Intrauterine growth restriction or IUGR is a condition that occurs during the pregnancy of growth of the fetus in the mother's womb. It is found in women with normal or underweight conditions.

This can result in a baby small for gestational age which is also called SGA which is a case of the weight being below ten percent for the gestational age.

Thus, the correct answer is - intrauterine growth restriction.