weight-gain-during-pragnancy

Weight Gain During Pregnancy – How Much?

May 14, 2025 Women

Weight Gain During Pregnancy

Weight gain during pregnancy is one important measure of how your baby is growing. Eating mostly healthy foods with occasional treats can help keep your weight gain on track.

To get the most accurate reading of your weight, follow these tips:

  • ✓ Weigh yourself at the same time of day. For example, first thing in the morning, after using the restroom, and wearing the same pajamas or light clothing, without shoes.
  • ✓ Weigh yourself once a week, not every day. Your weight can vary a lot from day to day depending on what you eat and drink and your bathroom habits.
  • ✓ Use the same scale each time. Different scales can give different readings so only compare weights from the same scale. Don’t compare your weight at home with your weight at your doctor’s office.

How Much Should You Gain?

The amount of weight you should gain during pregnancy depends on your Body Mass Index (BMI) before becoming pregnant. You can find your BMI here.

Pre-Pregnancy BMI

Recommended Weight Gain in 2nd and 3rd trimester

Total Weight Gain Goal at Delivery

Underweight

BMI <18.5

1 pound

28-40 pounds

Normal Weight

BMI 18.5-24.9

1 pound

25-35 pounds

Overweight

BMI 25-29.9

0.6 pounds

15-25 pounds

Obese

BMI 30 or over

0.5 pounds

11-20 pounds

Why Too Much Weight Gain is a Problem

Gaining too much weight during
pregnancy can:

  • Lead to a larger baby and increase the risk of needing a C-section.
  • Make it harder to lose weight after pregnancy.
  • Increase your baby’s risk of being overweight as they get older.
  • Raise your risk of developing high blood pressure and pre-eclampsia.

Warning signs of preeclampsia:
If you gain more than 3 pounds a week in the 2nd or 3rd trimester and have swollen hands or feet, severe headaches, or trouble seeing, contact your doctor right away! These could be signs of preeclampsia — a serious problem during pregnancy that can harm you and your baby.

Why Not Gaining Enough Weight is a Problem

Not gaining enough weight during pregnancy can:

  • Increase the risk of stillbirth.
  • Increase the risk of your baby being born with a low birthweight or premature.
  • Increase your baby’s risk of having low muscle and fat mass, small length, and smaller head size.
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Common Reasons for Too Much Weight Gain

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Eating too much

You don’t need to double your food intake just because you’re “eating for two.”

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Not being active

Moving your body helps burn calories and fat.

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Inaccurate weighing

Using different scales or wearing heavy clothes can affect your weight reading.

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Carrying multiples

If your weight gain seems high, talk to your doctor to see if you might be expecting twins or more.

Common Reasons for Not Enough Weight Gain

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You were underweight before pregnancy

You may have a fast metabolism and may need to work hard to get in the calories you need.

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You’re too active or too busy to eat

Try to slow down and set reminders to eat.

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You can’t eat much due to heartburn, gas, or nausea

Nausea usually goes away in the second trimester. For tips to help heartburn, see Feeling the Burn? Get Heartburn Help Now!

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Stress, anxiety, depression, and a history of eating disorders

can also affect your appetite and ability to eat. Lack of money to buy food may also be a problem. Talk to your doctor or WIC counselor to discuss eating problems and other food resources.

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Younger women, single women, and those with HIV or gestational diabetes

may also be at risk for not gaining enough weight. Take special care with your diet if these describe you.

Smoking

is also linked with lower weight gain and can also cause many other problems. Try to quit or cut down and reach out to WIC for support.

Is Your Diet Fit for Pregnancy?

Ask yourself these questions:

Do you drink sugary drinks more than twice a week?

Do you eat chips, fries, or processed snacks more than three times a week?

Do you plan your meal portions before eating?

Do you eat the skin on chicken or fat on steak?

Do you eat when you’re bored, sad, or happy instead of when you’re hungry?

Do you eat fast food or fried food more than once a week?

Do you eat while watching TV or using your phone?

Do you watch more than 2 hours of TV or screens daily?

Are you mostly inactive (sitting a lot, not walking much)?

Do you eat fewer than two servings of fruits and vegetables a day?

If you answered yes to four or more questions, you may be at risk of gaining too much weight.

Tips for Healthy Weight Gain

If you’re gaining too much weight…
  • Before you sit down to eat, plan out how much you’ll eat.
  • Avoid or cut down on the amount of fast food and fried food you eat.
  • Choose more whole grains, fruits, and vegetables.
  • Limit sugar-sweetened drinks; choose water instead.
  • Avoid eating while doing something else, like watching TV.
  • Walk or do another doctor-approved exercise for 30 minutes a day, 5 days a week, for a total of 150 minutes each week. Learn more about recommended exercise during pregnancy.
  • Talk with WIC about programs that can help you manage weight gain.
If you’re not gaining enough weight…
  • Don’t skip any food groups. Some women skip dairy or starchy foods. Milk at each meal can help with calories, calcium, and other nutrients.
  • Add cheese to sandwiches, mashed or baked potatoes, pasta, or veggies.
  • Eat often. Getting all the nutrition you need with just 3 meals a day is hard. Snacks can be mini meals like half a sandwich, a bowl of bean soup, or a baked potato with cheese, or smaller snacks like string cheese, yogurt, a fruit smoothie, crackers and peanut butter, or trail mix.
  • Eat more foods with healthy fats like avocado, peanut or sunflower seed butter, bean dip, and hummus. You can also use more oil in cooking and more salad dressing.
  • Try an occasional “healthy splurge” like frozen yogurt, banana or pumpkin bread, egg custard, or pumpkin pie.

If you are underweight before pregnancy,

pay special attention to your weight gain in the second trimester. Research shows that during that time, enough weight gain is important to prevent having a small baby.

Gaining the right amount of weight during pregnancy is important for both you and your baby. Eating healthy, staying active, and tracking your weight can help you stay on track. If you’re unsure about your weight gain, talk to your doctor or WIC for support. Small changes can make a big difference in having a healthy pregnancy!

REFERENCES

León-Muñoz, L. M., García-Esquinas, E., Soler-Vila, H., Guallar-Castillón, P., Banegas, J. R., & Rodríguez-Artalejo, F. (2016). Unhealthy eating behaviors and weight gain: A prospective study in young and middle-age adults. Obesity (Silver Spring), 24(5), 1178–1184.
https://doi.org/10.1002/oby.21477

American College of Obstetricians and Gynecologists. (2021). ACOG Practice Bulletin No. 230: Obesity in pregnancy.
https://www.fasgo.org.ar/images/obesidad-en-el-embarazo.pdf

Teede, H. J., Bailey, C., Moran, L. J., Bahri Khomami, M., Enticott, J., Ranasinha, S., Rogozinska, E., Skouteris, H., Boyle, J. A., Thangaratinam, S., & Harrison, C. L. (2022). Association of antenatal diet and physical activity-based interventions with gestational weight gain and pregnancy outcomes: A systematic review and meta-analysis. JAMA Internal Medicine, 182(2), 106–114.
https://doi.org/10.1001/jamainternmed.2021.6373

Hirko, K. A., Comstock, S. S., Strakovsky, R. S., & Kerver, J. M. (2020). Diet during pregnancy and gestational weight gain in a Michigan pregnancy cohort. Current Developments in Nutrition, 4(8), nzaa121.
https://doi.org/10.1093/cdn/nzaa121

Herring, S. J., Nelson, D. B., Davey, A., Klotz, A. A., Dibble, L. V., Oken, E., & Foster, G. D. (2012). Determinants of excessive gestational weight gain in urban, low-income women. Women’s Health Issues, 22(5), e439–e446.
https://doi.org/10.1016/j.whi.2012.05.004

Catalano, P. M., Mele, L., Landon, M. B., Ramin, S. M., Reddy, U. M., Casey, B., Wapner, R. J., Varner, M. W., Rouse, D. J., Thorp, J. M., Saade, G., Sorokin, Y., Peaceman, A. M., Tolosa, J. E., & Eunice Kennedy Shriver National Institute of Child Health and Human Development Maternal-Fetal Medicine Units Network. (2014). Inadequate weight gain in overweight and obese pregnant women: What is the effect on fetal growth? American Journal of Obstetrics and Gynecology, 211(2), 137.e1-137.e7.
https://doi.org/10.1016/j.ajog.2014.02.004

Darling, A. M., Wang, D., Perumal, N., Liu, E., Wang, M., Ahmed, T., Christian, P., Dewey, K. G., Kac, G., Kennedy, S. H., Subramoney, V., Briggs, B., & Fawzi, W. W. (2023). Risk factors for inadequate and excessive gestational weight gain in 25 low- and middle-income countries: An individual-level participant meta-analysis. PLOS Medicine, 20(7), e1004236.
https://doi.org/10.1371/journal.pmed.1004236

Wei, X., Shen, S., Huang, P., Xiao, X., Lin, S., Zhang, L., Wang, C., Lu, M. S., Lu, J., Tam, W. H., Wang, C. C., He, J. R., & Qiu, X. (2022). Gestational weight gain rates in the first and second trimesters are associated with small for gestational age among underweight women: A prospective birth cohort study. BMC Pregnancy and Childbirth, 22(1), 106.
https://doi.org/10.1186/s12884-022-04433-4

Author: Bridget Swinney MS, RDN, LD