Young babies are attracted to the scent of their mothers' breastmilk and prefer it to the scent of other women's milk. In one type of experiment, two breast pads were placed to the sides of the heads of newborns only a few days old. On one side was the breast pad from the infant's mother, and on the other side the pad from another lactating mother. In experiments like these, babies reliably turn toward the breast pad of their mother.