colostrum
Pronunciation: kuh-LOS-trum
The first form of breast milk produced during pregnancy and immediately after birth, rich in antibodies and nutrients.
Full Definition
Colostrum is the initial milk produced by the mammary glands during late pregnancy and the first few days after delivery. This thick, yellowish fluid is highly concentrated in immunoglobulins, particularly IgA, which provide passive immunity to the newborn. Colostrum also contains high levels of protein, vitamins, and minerals essential for early neonatal development. Production typically transitions to mature milk within 2-5 days postpartum. Healthcare providers often emphasize the importance of early breastfeeding to ensure infants receive this vital first nutrition.
Usage
Usage note: Avoid confusion with 'colostra' (plural form rarely used in clinical documentation).
In Context
- "The mother successfully expressed colostrum within two hours of delivery." — Breastfeeding assessment
- "Colostrum production was adequate, providing essential immunity factors for the preterm infant." — Neonatal care notes