What is the recommended weight gain during pregnancy for underweight women?

The recommended weight gain for underweight women during pregnancy is 28 to 40 pounds. This recommendation is based on the need to ensure that both the mother and the developing fetus receive adequate nutrition for healthy growth and development.

Underweight women, defined as having a pre-pregnancy body mass index (BMI) of less than 18.5, are at risk for various complications, including preterm birth, low birth weight, and developmental issues in the baby. The higher weight gain recommendation for this group helps to mitigate these risks by providing the necessary calories and nutrients.

Weight gain should be gradual and is typically advised to occur in three trimesters, with a greater increase expected in the second and third trimesters when fetal growth accelerates significantly. The guidelines emphasize the importance of monitoring weight gain throughout pregnancy to ensure it is within the recommended range based on pre-pregnancy weight status. By aiming for the 28 to 40-pound gain, underweight women can promote a healthier pregnancy outcome for themselves and their babies.