Healthy Pregnancy Weight Gain Tracker
Calculate recommended weight gain by trimester based on your pre-pregnancy BMI. ACOG guidelines.
ACOG Weight Gain Guidelines
The American College of Obstetricians and Gynecologists recommends weight gain based on pre-pregnancy BMI: Underweight (BMI <18.5): 28-40 lbs. Normal weight (18.5-24.9): 25-35 lbs. Overweight (25-29.9): 15-25 lbs. Obese (30+): 11-20 lbs. Twins: 37-54 lbs regardless of BMI. Most weight gain occurs in the 2nd and 3rd trimesters.
Where Does the Weight Go?
At delivery, the average breakdown: Baby 7-8 lbs, placenta 1.5 lbs, amniotic fluid 2 lbs, uterus growth 2 lbs, breast tissue 2 lbs, blood volume increase 4 lbs, body fluids 4 lbs, fat stores 5-9 lbs. Total: 27-32 lbs for a normal-weight woman. Most women lose 10-15 lbs at delivery and another 10-15 lbs over the following 6 months.
A landmark study in Obstetrics & Gynecology found that women who gained within ACOG guidelines had significantly better outcomes: 50% lower C-section rate, 60% lower gestational diabetes rate, and lost pregnancy weight 3x faster postpartum compared to women who gained excessively.
