#asktheexpert ..how to know that the formula I am giving to my baby is working for her?

A. As long as your infant is steadily gaining weight—about 6 ounces a week—and wetting diapers at least once every six hours, there's often little to worry about. But when spit up amounts to more than 2 tablespoons at each feeding, it could be a sign of a formula intolerance.