4 Reasons Your Left Breast Produces More Milk

Notice something odd about your milk production? Many moms observe their left breast produces more milk. It’s not just you, and yes, there’s a reason! In this post, I’ll dive into the science behind this phenomenon. Plus, easy tips to balance milk flow and boost comfort. Stay tuned as we explore hormonal and anatomical reasons.

Understanding Why Your Left Breast Produces More Milk

It is common for breastfeeding mothers to experience variations in milk production between their breasts. This can result in one left breast producing more milk than the other, known as asymmetrical milk production. Several factors can contribute to these variations, such as positioning and latching of the breast, hormonal changes, and previous breast surgeries.

In some cases, the baby’s feeding patterns can also influence asymmetrical milk production. For example, if the baby favors one breast over the other, it may produce uneven milk. Breastfeeding mothers must monitor their milk supply and seek support from lactation consultants or healthcare professionals if they have concerns about asymmetrical milk production.

Anatomy differences Left breast produces more milk

  • Variations in glandular tissue between breasts.

Glandular tissue plays a crucial role in milk production. It contains specialized cells called alveoli, which produce and store milk. The variations in glandular tissue between breasts can lead to differences in the number and size of alveoli, resulting in one breast producing more milk than the other.

  • Dominant hand influence

Studies have shown that a woman’s dominant hand may cause the Left Breast to produce more milk than the Right Breast.

Previous Surgery or Injury

  • Surgical effects

A surgical procedure such as a biopsy or a reduction can disrupt milk ducts and affect milk flow. As a result, the affected breast may produce less milk than the unaffected breast, leading to uneven milk production. This imbalance can be temporary or permanent, depending on the extent of the disruption to the milk ducts during the surgical procedure.

  • Scars and injuries

Often, scarring or injuries can obstruct milk from flowing freely, potentially resulting in an imbalance of milk production. This can cause mastitis, an inflammation of the breast tissue, and can also lead to other complications such as infection or abscess. It is essential to seek medical advice if these conditions arise.

Baby’s Preference

  • Latch and suckling influence

If your baby latches or suckles on one breast more than the other, it can affect your baby’s milk production. This can cause an imbalance in milk supply, leading to nipple pain and mastitis. It is essential to make sure both breasts are receiving the same level of attention when feeding your baby.

  • Comfort levels

Your baby’s position during feeding can also influence which breast is preferred, potentially leading to uneven milk production. If your baby is more comfortable in one position, they may choose one breast. This can lead to an imbalance in milk production, which can be corrected by adjusting the baby’s position during feeding.


Understanding why your left breast produces more milk than your right breast can be helpful when breastfeeding when breastfeeding. Speak with a lactation expert for personalized guidance regarding asymmetrical. Remember that every drop of milk you provide is a precious gift to your child. Embrace the uniqueness of your breastfeeding journey.

Despite uneven milk production, you can nourish your baby with love and care if you have the proper knowledge and support.