One breast not producing enough milk: what to know

Each breast has its own milk-making tissue and drainage pattern, so supply does not have to match from side to side. A baby may prefer one position, or a shallow latch may remove milk less effectively on one side. Previous breast surgery, pain, swelling, a blocked duct or infection can also affect feeding.

Breast fullness does not reliably show how much milk your baby receives. More useful clues include swallowing during feeds, relaxed hands after feeding, steady wet nappies and weight checks arranged by your baby's clinician. A lactation professional can watch a feed and assess both breasts and the baby's latch.

Offer the lower-producing breast first when your baby is calm, then offer the other side. Try a different hold, bring your baby's nose level with the nipple, and wait for a wide mouth before latching. If your baby does not drain that side well, express after a feed for a short period as advised. Alternate the starting side when your goal is comfort rather than extra stimulation, and avoid forcing a feed when your baby is distressed.

Arrange feeding support if your baby is unusually sleepy, feeds poorly, has fewer wet nappies, seems unsatisfied after most feeds or is not gaining weight as expected. Seek medical care for a hot, red, painful area, fever, worsening breast swelling or a persistent lump. A lactation consultation can provide a tailored feeding assessment and plan.

Ask whether your baby's latch and weight gain are reassuring, how often to offer each breast, whether expressing would help, and how to recognise dehydration. Ask about pain, medicines or breast changes that need examination.