Breastmilk production begins during pregnancy, several weeks, or even months, before your due date and is triggered by changes in hormone levels. When your baby is first born, you’ll produce a small amount of nutrient-rich milk to begin with, which is fine as your little one’s stomach is about the size of a marble! This precious stuff is known as colostrum or "liquid gold" – that’s because it's packed with protein, growth factors, white blood cells and antibodies that help fight off infections and allergies.
Because it’s so full of goodness, colostrum has a thick consistency, and is often golden yellow in color, and it contains all that your newborn’s tiny tummy needs during the first few days post-birth.
Around five days after birth, the second stage of breastmilk production begins, and usually lasts for two or three weeks. You may hear this referred to as your milk “coming in”. During this stage of nursing, you’ll begin to produce more calorie-rich milk for your little one as they develop a larger appetite, this will help them to gain back some of the weight that they lost after birth.
Seeing as the milk produced in this stage is a mix of colostrum and mature milk, it’s color and consistency can vary from mom to mom and will continue to change as time goes on.
It’s common to experience engorgement during this stage, which can be painful and uncomfortable. To relive the symptoms of engorgement, you can use a cold compress to ease swelling, apply a heat pack to help the flow of milk, or try expressing a small amount of breastmilk before feeding using a breast pump.
By the time that your little one is about two weeks old, the breastmilk you produce is known as mature milk. It’s lower in protein but higher in fat and carbohydrates and is often white, light yellow, or blue-tinged in color. The milk available when your baby starts each feed is known as foremilk and hindmilk is the milk your baby gets at the end of a feed. How much you make adjusts according to your baby's habits and needs.
Mature milk is packed full of everything your baby needs for healthy growth and development for the first six months of their life, and you can continue to breastfeed as your baby begins to explore solid foods. If you or your baby are under the weather, it can adapt to support your baby's immune system. It continues to be produced until you decide to stop breastfeeding, or if you become pregnant again.