What is the primary characteristic of colostrum?

The primary characteristic of colostrum is that it is the early milk produced just after birth. Colostrum is rich in antibodies and nutrients that are crucial for the newborn's immune system and overall health. It is produced in small quantities during the first few days postpartum, which is essential for providing the newborn with the initial boost of immunity.

While colostrum does have specific nutritional components, such as higher protein content and lower carbohydrate levels compared to mature milk, its defining feature is primarily its timing – being the very first milk available to the newborn right after delivery. This unique role makes it vital for a newborn's well-being, as it helps protect against infections and establish a healthy digestive system. Other options may reflect characteristics of colostrum to some degree, but they do not capture its most critical aspect of being the initial milk produced right after birth.