Birthly Blog

Understanding Weight Gain During Pregnancy

Written by Birthly Team | October 17, 2024

Weight gain during pregnancy is a normal and healthy part of supporting your baby’s growth and development. However, many expecting mothers wonder, "How much weight should I gain?" The answer depends on several factors, including your pre-pregnancy weight and individual health needs.

Note: These recommendations are for pregnancies with one baby (singleton pregnancies). If you’re expecting twins, triplets, or more, the recommended weight gain will be higher. Be sure to consult your healthcare provider for specific guidelines tailored to your situation.

Recommended Weight Gain

According to experts, here are general guidelines based on your pre-pregnancy Body Mass Index (BMI):

  • Underweight (BMI < 18.5): Gain 28-40 pounds
  • Normal weight (BMI 18.5-24.9): Gain 25-35 pounds
  • Overweight (BMI 25-29.9): Gain 15-25 pounds
  • Obese (BMI > 30): Gain 11-20 pounds

Your healthcare provider will guide you on what’s ideal for your unique situation. Most weight gain occurs in the second and third trimesters, when your baby is growing rapidly.

Where Does the Weight Go?

It’s not just your baby adding pounds! Here’s a breakdown of where the weight goes during pregnancy:

  • Baby: ~7-8 pounds
  • Placenta: ~1.5 pounds
  • Amniotic fluid: ~2 pounds
  • Increased blood volume: ~3-4 pounds
  • Breast tissue: ~1-3 pounds
  • Fat stores for breastfeeding: ~6-8 pounds
  • Increased fluid volume: ~2-3 pounds
  • Uterus: ~2 pounds


Tips for Healthy Weight Gain

  1. Eat Nutrient-Dense Foods: Focus on fruits, vegetables, whole grains, lean proteins, and healthy fats.
  2. Stay Active: Gentle exercise like walking or prenatal yoga can help maintain a healthy weight and boost your mood.
  3. Hydrate: Drinking plenty of water supports your increased blood volume and helps prevent constipation.


Remember, Every Pregnancy is Different

Don’t stress about the scale! As long as you’re eating nutritious meals and following your healthcare provider’s guidance, your body will gain the weight it needs to support a healthy pregnancy.

Weight gain during pregnancy is part of the amazing process your body undergoes to support new life. Focus on balanced eating and staying active, and your body will take care of the rest!