Low milk supply is a condition in which a breastfeeding mother produces insufficient milk to meet her baby's needs, though true low supply is less common than many mothers fear.
Low milk supply refers to a situation where a breastfeeding mother is not producing enough milk to satisfy her baby's nutritional requirements. The NHS notes that when first starting to breastfeed, many mothers worry about whether their baby is receiving enough milk, and that it can take time before confidence develops. Breast milk is produced on a supply-and-demand basis: the more frequently milk is removed from the breasts, the more milk will be produced.
What are the signs that a baby may not be getting enough milk?
The NHS identifies several indicators that a baby may be receiving insufficient milk. These include poor weight gain (after the normal postnatal weight loss and recovery in the first two weeks), fewer than six heavy wet nappies per 24 hours from day five onwards, fewer than two soft yellow stools per day from day four, and a baby who does not appear content or satisfied after most feeds. Positive signs that a baby is feeding well include "long, rhythmic sucks and swallows", "their mouth looks moist after feeds", and the baby self-detaching at the end of a feed.
What causes low milk supply?
According to the NHS, common causes include poor attachment and positioning at the breast, not feeding the baby often enough or not offering the breast whenever the baby shows signs of hunger, introducing formula before breastfeeding is established, using a dummy before feeding is well established, maternal separation from the baby without expressing, and certain medications. The NHS also notes that tongue tie can restrict the baby's tongue movement, reducing effective milk transfer and thereby reducing the signal to the breast to produce more milk. Stress, anxiety, depression, illness in mother or baby, and previous breast surgery affecting nipple positioning can also play a role.
How is low milk supply addressed?
NHS guidance emphasises that milk supply responds to demand. Recommended approaches include breastfeeding on demand without time restrictions, offering both breasts at each feed, skin-to-skin contact, and avoiding formula supplementation until breastfeeding is established. The NHS advises mothers who are concerned to contact their midwife, health visitor, or a breastfeeding specialist as soon as possible, and also lists the National Breastfeeding Helpline (0300 100 0212) as a resource available 24 hours a day.
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