Breastfeeding and Uneven Breasts

Tips For Getting Your Breasts Back To A Similar Size

Ian Hooton/Dorling Kindersley/Getty Images

If you are a breastfeeding mom, you will experience some degree of unevenness in your breasts at some point. Depending on which breast you last nursed on and whether you breastfeed from one side or both sides at each feeding, your breasts will fill up with breast milk at different rates. This is normal, and it is usually more noticeable during the first few weeks after the birth of your baby when your milk supply is still adjusting.

However, even after the first few weeks, your breasts can still become lopsided.

If one breast gets more stimulation than the other, it will produce more milk and become larger than the other one. This can happen when a baby prefers one breast over the other or if you start nursing on the same breast most of the time. As long as your baby is getting enough milk and growing at a steady rate, uneven breasts aren't really anything to worry about. But, if your uncomfortable or it bothers you, there are some things you can do to try to get your breasts back to a similar size.

How To Even Out Your Breasts

  • Start each feeding on the smaller breast until that side catches up in size. After a few days you should notice that your breasts are becoming more balanced.
  • Use a breast pump to further stimulate the smaller breast after nursing. This will help to increase the milk supply in that breast which should help to increase it's size.
  • If your baby has a breast preference and refuses to nurse on one side, try to find out the reason behind your baby's preference. The article Breast Preference can provide you with more information about the causes of a breast preference as well as tips for dealing with your child's preference of one breast over the over.
  • Do not completely neglect the larger breast or it could end up becoming the smaller one and you will be right back where you started. Keep the milk supply strong in your larger breast by pumping the milk in that breast while you are spending more time nursing on the other one.
  • When you are nursing more often on the smaller breast, the larger breast may become engorged. To avoid the complications of engorgement, pump or hand express milk from that breast to relieve the pain and pressure. You can then collect and store that breast milk for use at a later time.
  • Once your breasts are back to where you'd like them to be, go back to alternating the breast you start each feeding with in order to help keep them even.

If one breast has been consistently smaller from the beginning and did not get any larger throughout your pregnancy or early postpartum period, talk to your doctor. Although it is not a common problem, a small percentage of women have hypoplastic breasts which could affect just one side.

If this is the case, you may not be able to even out your breasts, but you can still breastfeed. 


American Academy of Pediatrics. New Mother’s Guide To Breastfeeding. Bantam Books. New York. 2011.

Lawrence, Ruth A., MD, Lawrence, Robert M., MD. Breastfeeding A Guide For The Medical Profession Sixth Edition.  Mosby. Philadelphia. 2005.

Continue Reading