The idea that milk only “comes in” a few days after birth is actually a misnomer. In reality, milk production begins during pregnancy. Most people start producing colostrum as early as 12–16 weeks gestation. Colostrum is milk: it’s the first, highly concentrated, antibody-rich form of breast milk specifically designed for a newborn’s needs. Unless there is a true medical indication (such as significant weight loss, blood sugar concerns, or dehydration), supplementing with formula during this tim