What is the recommended weight gain during pregnancy for a woman with a normal pre-pregnancy BMI?

The recommended weight gain during pregnancy for a woman with a normal pre-pregnancy Body Mass Index (BMI) falls within the range of 25 to 35 pounds. This guideline is based on the understanding that appropriate weight gain supports fetal development while also accounting for the physiological changes that occur in the mother's body during pregnancy.

Women classified with a normal pre-pregnancy BMI typically have a healthy weight from which to gain the necessary additional weight that contributes to the growing fetus, placental weight, amniotic fluid, breast tissue, and increased blood volume. The recommendations aim to optimize maternal and fetal health, minimizing risks associated with both underweight and excessive weight gain.

The specified weight gain ensures that the baby receives adequate nutrition and support for optimal growth. Insufficient or excessive weight gain can lead to complications such as low birth weight or gestational diabetes, respectively.