For each pumping session, expect to pump each breast for 10 to 15 minutes. The goal is to empty the breast of milk, so the exact time varies depending on a mother's milk production.
When pumping while working full-time, it is ideal to pump whenever the infant is normally fed. However, this may be impractical for a work schedule. In this case, finding three times throughout the work day should supply enough breast milk to feed a child for the next work day. One can also decrease the time spent pumping by using a device that pumps both breasts at once. A mother who is exclusively pumping and not breastfeeding at all can expect to get ample supply by pumping eight to 10 times a day in the beginning, and then six to seven times per day once full milk production is achieved.