How much weight should I gain during pregnancy?

Question

Accepted Answer

The U.S. National Academy of Medicine (NAM, formerly IOM) 2009 pregnancy weight gain guidelines set recommended ranges by pre-pregnancy body mass index (BMI). For singleton pregnancy, underweight (BMI under 18.5) is 12.5–18 kg, normal (18.5–24.9) is 11.5–16 kg, overweight (25–29.9) is 7–11.5 kg, and obese (30 or above) is 5–9 kg. First trimester gain is typically 0.5–2 kg, and recommended weekly gain in the second and third trimesters ranges 0.2–0.5 kg depending on BMI category. Twin pregnancies have higher ranges: 16.8–24.5 kg for normal BMI, 14.1–22.7 kg for overweight, and 11.3–19.1 kg for obese. This calculator displays the NAM recommended ranges and is not a medical prescription. Gestational diabetes, gestational hypertension, multifetal pregnancy, and adolescent pregnancy require an individualized assessment by an obstetrician.