Pump 20 mins, rest 10 mins, pump 10mins, rest 10mins, pump 10mins. If you dont have an issue with supply, there's no need to power pump. Pumping too soon may also cause oversupply so it's best to start after breastfeeding is established. If you are latching baby mostnof the time, you may want to consider getting a haakaa pump to collect milk on the other side.