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colostrum

The first breast milk, a thick yellowish fluid made in late pregnancy and the first few days after birth.

kuh-LOS-trum noun

What it means

Colostrum comes in small amounts that suit a newborn's small stomach. It is rich in protein and antibodies (especially IgA) that protect the baby's gut, and it helps the baby pass the first stool (meconium). Over about the first three to five days it changes into mature milk.

For the nurse

Reassure parents that small amounts of colostrum are normal and enough for the first days. Encourage frequent feeding, 8 to 12 times in 24 hours.

At a glance

Spanishcalostro

Related terms

postpartum

The time after giving birth, usually the first six weeks, while the body returns to its non-pregnant state.

breastfeeding

Feeding a baby with milk directly from the breast.

lactation

The making and release of milk by the breasts.

engorgement

Swelling and painful fullness of the breasts as milk comes in or builds up.

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