A breast pump mimics the sucking rhythm of you child, so you can collect breast milk. That's useful, because you can use the breast pump to build up a stock of milk, or you can maintain the milk production when your working again. There are 2 types of breast pumps. You can choose between a manual pump or an electric pump. Which pump is best for you depends on your wishes. A manual pump is silent and compact, but you can pump faster with an electric pump. With an electric pump, you can choose between a single or double pump. With a single electric pump, you can pump 1 breast at a time, and you can pump both breasts at the same time with a double pump. A double breast pump pump faster and often collects more breast milk than a single breast pump.