How many minutes it takes to get hindmilk depends mainly on how much milk the mom has and how long between feedings, there is no definite point in time for how long. The milk that comes out is called foremilk, which is a lighter water-like liquid that is rich in protein, lactose, vitamins, inorganic salts, and water, but has more water in it. Hindmilk provides a better supply of calories to make your baby feel full and help him gain weight. Usually babies suck for about 15 minutes on each side, and long and hard breastfeeding will also stimulate the lactation reflex, so that the mother’s milk will be richer and thicker, and the baby will grow meat. It is recommended that when moms and dads breastfeed their babies, they should let their babies empty one breast before switching to the other, so that they can eat enough foremilk to ensure nutrition, and also try to eat enough hindmilk so as not to starve too quickly.