In pregnancy for a client with a low BMI, what is the safe weight gain?

• A. 28 to 40 pounds
• B. 15 to 25 pounds
• C. 25 to 35 pounds
• D. 5 to 10 pounds

Answer: (A)

When a pregnant client has a low BMI, the aim is to build enough maternal stores while supporting fetal growth. For underweight individuals, the recommended total weight gain is about 28 to 40 pounds. This higher range compared with other BMI groups acknowledges the need to supply adequate nutrients to the fetus and to replenish maternal reserves, reducing risks like low birth weight and growth restriction. A typical pattern is a small gain in the first trimester, then about one pound per week in the second and third trimesters, helping reach the total target safely. Gains outside this range can raise risks: too little may compromise fetal growth, while too much can increase chances of complications such as gestational diabetes, hypertension, or delivering a larger baby.