ZocdocAnswersHow much weight should a pregnant woman gain?

Question

How much weight should a pregnant woman gain?

My wife if 6 months pregnant and her weight gain hasn't really leveled off at all. The only thing I can compare it to is her previous pregnancy, but it seemed like she took on less weight then. What is a healthy amount of weight for a woman to gain during pregnancy,and what is too much? She's a pretty small woman, by the way.

Answer

Questions about pregnancy are best answered by an obstetrician. Depending on the circumstances, a specialist in high-risk pregnancies can also be consulted. Weight gain is normal and healthy during pregnancy. The approximate amount of weight a woman should gain depends on her pre-pregnancy weight. A woman who was of average weight (defined as a BMI between 18.5-25) before she became pregnant should gain between 25-35 pounds with a singleton pregnancy. A woman who was underweight before pregnancy (BMI less than 18.5) should gain approximately 28-40 pounds while pregnant. Finally, a woman who was overweight before pregnancy (BMI greater than 25) should gain 15-25 pounds during pregnancy. There is a weight range associated with each category, to account for the many degrees of healthy variation in an individual woman's body type, pre-pregnancy state, and pregnancy itself. In addition, non-singleton pregnancies (twins, triplets, etc) will result in greater weight gain. Gaining excessive amounts of weight during pregnancy can be harmful for both mother and baby. Likewise, the same is true of insufficient weight gain. Any concerns about healthy weight gain during pregnancy should be discussed with an obstetrician. This will help ensure the best outcome for both mother and baby.

This answer is for general informational purposes only and is not a substitute for professional medical advice.

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