Colostrum is the yellowish or creamy milk that you secrete in the first couple of days after birth. It’s often called “baby’s first milk” or “pre-milk.” Colostrum is much thicker than your mature breast milk, and full of immunoglobulins and antibodies that will help protect your baby from the millions of germs and bacteria that exist in our world.
Although you may not realize it, but your breasts have been producing colostrum since the beginning of your second trimester. If you experienced any breast leakage in pregnancy, that was colostrum.