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How Breastmilk Changes

Your breastmilk is always changing to meet the needs of your growing baby. It changes from minute to minute, day to day, and during each feeding. Breastmilk has over 200 known ingredients, and these ingredients provide the nutrition and health protection your child needs.

Breastmilk is always changing

Breastmilk at the beginning of a feed is more watery, and helps to satisfy thirst. As the feeding goes on your breastmilk changes, gradually becoming thicker. Breastmilk towards the end of a feeding is higher in fat which helps them to feel full.


The breastmilk in the first days following birth is called colostrum. Colostrum is perfectly designed to meet the needs of a newborn baby. At each feeding your body makes small amounts of colostrum. This is because your baby’s stomach is small.

Colostrum is yellow, thick and sticky. It provides all the nutrition a healthy, full term baby needs. It is full of antibodies that help protect your baby from infections and illnesses. It has enzymes that help your baby to poop.

Transitional Breastmilk

Within 2 to 5 days of your baby's birth you will notice a change in your breastmilk. This transitional breastmilk is a mixture of colostrum and mature milk. The amount of breastmilk your body makes for each feed will start to increase. During this time the breastfeeding parent will notice that their breasts feel fuller.

Mature Breastmilk

Mature breastmilk begins from about 5 to 7 days after your baby is born. It is thinner, whitish, and there is more of it. Your breastmilk continues to change as your baby grows. It provides all the protein, carbohydrates, fats, vitamins, minerals and water needed for your child to grow and develop. Don’t forget all babies need vitamin D.

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