What is the recommended weight gain for a mother with a normal BMI during pregnancy?

The recommended weight gain for a mother with a normal Body Mass Index (BMI), which is defined as having a BMI between 18.5 and 24.9, is typically 25 to 35 pounds during pregnancy. This guideline is based on research that shows this weight gain range is associated with the best outcomes for both mothers and their babies. Adequate weight gain supports the healthy development of the fetus and helps reduce the risk of complications, such as low birth weight or preterm birth.

For mothers starting at a normal BMI, the weight gained should be gradual, with roughly a third of the total gain occurring in the first trimester and the rest in the second and third trimesters. This approach promotes healthy gestation and overall maternal health.

In contrast, recommendations for lower or higher weight gain align with specific categories of pre-pregnancy BMI outside the normal range. For example, underweight women are advised to gain more weight, while overweight or obese women have a lower range to optimize health during pregnancy. Thus, 25-35 pounds is the most appropriate and evidence-based recommendation for women with a normal BMI during pregnancy.