Colostrum is the 'first milk' produced by your breasts, starting during pregnancy. It is a concentrated form of "mature milk", which is very high in protein, antibodies and other protective components that are important for your newborn. It is thicker than mature milk and often has a yellowish colour to it. It is produced in small amounts (10-100 ml/24 hours), which is perfect for your newborn's tiny tummy. The smaller volumes also give your baby a chance to learn to nurse without being overwhelmed by a large flow of milk in the first few days. These smaller feedings encourage your baby to go back to the breast often in the first few days. This frequent stimulation is what increases your milk production - a lovely and effective feedback loop!