Breast-feeding and weight loss: What really happens?

Date Updated: 02/25/2022

Answer Section

Beyond providing nourishment and helping to protect your baby from getting sick, breast-feeding can also help you lose weight gained during pregnancy.

When you breast-feed, you use fat cells stored in your body during pregnancy — along with calories from your diet — to fuel your milk production and feed your baby. Weight loss during breast-feeding can occur even when you follow the recommendations to eat an additional 300 to 500 calories a day to keep up your energy and milk production.

However, after an immediate postpartum weight loss of about 15 pounds (6.8 kilograms), weight loss tends to happen gradually — at about 1 to 2 pounds (0.45 to 0.9 kilogram) a month for the first six months after childbirth and more slowly after that point. It often takes six to nine months to lose weight gained during pregnancy.

During breast-feeding, focus on making healthy choices. Opt for a variety of whole grains as well as fruits and vegetables and stay hydrated. If you're trying to lose weight, limit calories from added sugars and saturated fats such as soft drinks, desserts, fried foods, cheese, whole milk and fatty meats. Moderate physical activity can help, too. If, after six months of breast-feeding, you want to lose more weight, you can more carefully restrict your calories as your baby begins to eat more solid foods while continuing breast-feeding.