What is the Institute of Medicine's recommended weekly weight gain rate during the second and third trimesters for pregnant people with BMI > 30?

• A. 0.5
• B. 0.6
• C. 0.7
• D. 0.8

Answer: (A)

For people with BMI over 30, the guidance keeps the weekly weight gain in the second and third trimesters modest to balance fetal growth with maternal health. The Institute of Medicine recommends about 0.4–0.6 pounds per week during these trimesters. The value 0.5 pounds per week falls squarely in that range and serves as a practical, central target that supports healthy fetal development while limiting excess maternal fat gain. This aligns with the overall guideline that total weight gain for a singleton pregnancy in obesity is about 11–20 pounds. Choices that are closer to or above 0.7 or 0.8 pounds per week exceed the recommended range, while a value like 0.4 is at the lower edge; 0.5 is a common, balanced target within the advised range.