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Intermountain Healthcare answeredColostrum is the golden yellow milk that you pump the first days after your baby’s birth. It is packed with everything your baby needs to grow and provides extra antibodies (disease-fighting substances) that help your baby fight infections and other complications. After the first few days, your milk will become thinner and less yellow, until it becomes mature milk. Mothers who deliver preterm infants produce colostrum longer. This gives their babies more antibodies and extra protection for a longer time.
Colostrum is a sticky, thick, yellowish liquid produced by a woman's breasts toward the end of pregnancy and during the first few days after delivery of her baby. Colostrum contains protein, minerals and vitamins as well as valuable antibodies, which help protect the baby against disease.
Women who breast-feed transfer these important nutrients to their newborns. Colostrum is particularly suited to a newborn's needs and provides the ideal nutrition. Its yellow tint comes from higher levels of carotene, a form of vitamin A. Colostrum also may act as a laxative to help the infant pass the first few bowel movements, which are a dark green substance called meconium.
After a few days, a woman's breasts start supplying the baby with transitional milk as breast-feeding becomes established, followed by mature milk at about 10 to 15 days after delivery.
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Colostrum is the initial breast milk produced after giving birth. It is thicker than breast milk and may be a clear fluid or deep golden color. A minimum amount is produced compared with typical breast milk that comes in after several days. Colostrum contains the important components necessary for the baby's immune system.