What is the point at which colostrum is usually secreted during pregnancy?

Colostrum, the first form of milk produced by the mammary glands, typically begins to be secreted around the 16th week of gestation. This early lactation provides essential nutrients and antibodies vital for the newborn's immune system. The development of colostrum occurs as a result of hormonal changes during pregnancy, particularly the increase in estrogen and progesterone levels, which prepare the breasts for breastfeeding. While there can be some degree of variation among individuals, the commonly accepted timeframe for the noticeable production of colostrum is around the 16-week mark. Recognizing this developmental milestone is important for expectant mothers, as it can signify that their bodies are preparing for the postpartum phase and the establishment of breastfeeding.