Most experts suggest it is best if mom can come close to matching what the normal nursing baby would do at the breast, and recommend she pump about every two hours, not going longer than three hours between sessions. ... The more frequently the breasts are emptied, the more milk mother should have.

Do you have to pump every 2 hours at night?

It's a good idea to pump at least once during the night in the first few months or if you start to notice a dip in supply. Many moms and lactation consultants recommend pumping once between 1 am and 4 am, as most moms tend to have a high output at this time.

Should I pump every 2 or 3 hours at work?

So, how often should you pump at work? The rule of thumb is to replace all feedings your baby takes while away with a pumping session. Depending on how old your baby is and if they are taking solids, you will want to pump every 2-3 hours while away.