Recommended pregnancy weight gain range based on pre-pregnancy BMI
Based on the 2009 Institute of Medicine (National Academies) guidelines, endorsed by ACOG, for a single baby (about 1-4.5 lb total in the first trimester). Different ranges apply to twins or more. These are general ranges, not targets for every pregnancy. Ask your midwife or doctor before trying to gain or lose weight during pregnancy.
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Pregnancy Weight Gain is built on published formulas and reference ranges from established health sources. We revisit it periodically as guidance evolves; the "Last reviewed" date above shows when that last happened. If something looks wrong, tell us with the feedback button in the bottom-right corner.