Although the baby has received some antibodies through the placenta, colostrum contains a substance which is new to the newborn, secretory immunoglobulin A (Ig A).Ig A works to attack germs in the mucous membranes of the throat, lungs, and intestines, which are most likely to come under attack from germs.The first type, produced during the first days after childbirth, is called colostrum.Colostrum is easy to digest although it is more concentrated than mature milk.Current research strongly supports immediate skin-to-skin mother-baby contact even if the baby is born by Cesarean surgery.
The breast milk also has long-chain polyunsaturated fatty acids which help with normal retinal and neural development.
By convention, such children are often fed on expressed breast milk or other supplementary feeds through tubes or bottles until they develop satisfactory ability to suck breast milk.
Tube feeding, though commonly used, is not supported by scientific evidence as of October 2016.
Breast milk is made from nutrients in the mother's bloodstream and bodily stores.
It has an optimal balance of fat, sugar, water, and protein that is needed for a baby's growth and development.