It is common for one breast to produce more milk than the other during breastfeeding. This asymmetry is a normal occurrence for many individuals and a frequent concern for parents.
Common Reasons for Asymmetrical Production
One reason for uneven milk production is natural anatomical variation. Breasts can differ in the amount of milk-making tissue or the number and size of milk ducts. One breast may naturally possess more active glandular tissue, leading to a higher milk output.
A baby’s feeding patterns also significantly influence milk production. If a baby consistently prefers one breast, perhaps due to comfort, a better latch, or a preferred flow rate, that breast receives more stimulation. Increased demand on one side leads to increased supply over time. A parent’s own habits, such as consistently starting feeds or pumping sessions on one side, can also contribute to this imbalance.
Prior breast issues can also impact milk-making capacity. A history of surgery, injury, or conditions like mastitis or engorgement in one breast can affect its ability to produce milk. Scar tissue from past procedures, such as augmentation or reduction, may interfere with milk ducts, reducing output from the affected breast. Hormonal influences can also play a role, with subtle fluctuations potentially affecting one breast’s milk production differently than the other.
Strategies to Encourage Even Production
To encourage more balanced milk production, parents can begin feeding sessions on the less productive breast. Babies feed more vigorously at the start of a session, providing stronger stimulation. This increased demand signals the body to produce more milk in the less productive breast.
Increasing the frequency of feeding or pumping on the lower-producing side can also help. Adding extra pumping sessions specifically for that breast can boost its supply. Pumping both breasts simultaneously can increase overall milk output and stimulate milk ejection from both sides.
Ensuring a proper latch on both sides is important to maximize milk transfer and stimulation. A lactation consultant can help assess and improve latch effectiveness. Gentle breast massage before and during feeding or pumping can encourage milk flow and help drain the breast more effectively. Hand expression after feeding or pumping can also help to fully empty the less productive breast, further signaling increased production.
When to Consult a Professional
While asymmetrical milk production is often normal, certain situations warrant professional advice. If the asymmetry appears suddenly or is significant, a lactation consultant or healthcare provider can assess for underlying issues. Concerns about the baby’s weight gain or overall milk supply also indicate a need for professional evaluation.
Additionally, seek help if there is pain, redness, swelling, or lumps in either breast. These symptoms could indicate an infection like mastitis, a blocked milk duct, or other breast issues requiring medical attention. If attempts to balance production are unsuccessful and cause distress, or if any other unusual breast changes are observed, consulting a professional can provide reassurance and tailored guidance.