One of the most common questions new pumping moms ask is how long each session should last. The answer depends on a few factors, but there are clear evidence-based guidelines to help you build a pumping routine that is both effective and sustainable. Pumping the right amount of time per session — not too short, not too long — protects your supply and keeps pumping from taking over your day.
The General Guideline: 15 to 20 Minutes
For most moms, a pumping session of 15 to 20 minutes per breast is the sweet spot for effective milk removal. Sessions longer than 30 minutes are generally not recommended, as continuing to pump after milk flow has slowed significantly offers diminishing returns and can sometimes cause nipple irritation. The goal of each session is to effectively empty the breast — or come close to it — rather than to pump for a set number of minutes.
If your milk flow slows noticeably before the 15-minute mark, it is fine to stop once flow has ceased. Similarly, if you are still flowing well at 20 minutes, you can continue for a few more minutes. Pay attention to your body rather than watching the clock rigidly.
How Pumping Session Length Affects Supply
Breast milk production operates on a supply and demand basis. The more completely and frequently milk is removed, the more your body is signaled to produce. Short sessions that do not fully empty the breast can gradually reduce your supply over time. On the other hand, pumping long past the point where milk has stopped flowing does not increase supply and can lead to soreness and fatigue.
According to the Academy of Breastfeeding Medicine, frequent and thorough milk removal — whether through nursing or pumping — is the most evidence-supported way to establish and maintain a healthy milk supply. If you are concerned about your supply, adding pumping sessions is generally more effective than extending existing ones. For personalized guidance, connect with a Storkpump IBCLC at askanIBCLC@storkpump.com.
Hands-On Pumping: Getting More in Less Time
Using hands-on techniques during pumping has been shown to meaningfully increase milk output per session. Before you begin, spend a minute or two doing gentle breast massage to stimulate let-down. During the session, use breast compression — gently pressing and holding the breast — to encourage more complete milk drainage. After the pump has finished, a minute or two of hand expression can help remove additional milk that the pump may have missed, particularly the fat-rich hindmilk at the end of a session.
These techniques take a little practice but can make a significant difference, particularly for moms building a freezer stash or managing supply. A reliable, well-fitted pump makes hands-on pumping more effective. Browse insurance-covered breast pumps on Storkpump to find the right option for your routine.
Session Length by Pumping Goal
How long you pump can also depend on why you are pumping. If you are nursing primarily and pumping occasionally to build a stash, 10 to 15 minutes after a morning nursing session is often enough to collect a meaningful amount without overstimulating supply. If you are exclusively pumping, aim for 15 to 20 minutes per session and pump frequently enough to mimic your baby's feeding schedule — typically 8 or more times in 24 hours in the early weeks. If you are pumping at work to maintain supply, match your pumping sessions in frequency and length to your baby's feeding schedule at home as closely as possible.
How Pump Settings Affect Session Efficiency
The settings you use matter just as much as the time you spend pumping. Starting every session in let-down or stimulation mode — a faster, gentler setting — helps trigger milk flow before switching to expression mode for deeper, slower suction. Returning to let-down mode briefly about halfway through the session can trigger a second let-down and help you get more milk in the same amount of time. Always pump at the highest suction level that feels comfortable, not the highest setting available. More suction does not mean more milk and can cause soreness over time.
Equally important is confirming your flange fit. A flange that does not fit correctly reduces efficiency and comfort regardless of your settings or session length. Use the Storkpump Flange Sizing Guide to make sure you are starting with the right fit.
Frequently Asked Questions
Is it okay to pump for only 10 minutes?
It depends on your goal and where you are in your supply journey. In the early weeks when supply is being established, shorter sessions may not fully empty the breast and could slow supply development over time. Once supply is well established, a 10-minute session can be sufficient for moms who respond quickly to the pump and experience strong let-down. Pay attention to whether milk is still flowing when you stop.
What if I am not getting much milk in 20 minutes?
Low output per session does not always mean low supply. Output varies throughout the day, with morning sessions typically producing more than evening sessions. Stress, dehydration, and pump fit all affect output. If you are consistently getting very little milk despite pumping regularly, consult a Storkpump IBCLC at askanIBCLC@storkpump.com to rule out supply issues or equipment problems.
Should I pump both breasts at the same time?
Double pumping — pumping both breasts simultaneously — is more efficient and has been shown to increase overall output compared to single pumping. It is the recommended approach for most moms who are pumping regularly. If you are using a single pump or pumping one side while nursing on the other, that is a valid approach as well.
How long should I wait between pumping sessions?
In the early weeks, pumping every 2 to 3 hours is generally recommended to establish supply. As supply stabilizes, spacing sessions 3 to 4 hours apart is typical for moms who are also nursing. Exclusive pumpers should aim for at least 8 sessions in 24 hours to maintain supply, including one session between midnight and 5am when prolactin levels are highest. Visit the Storkpump Learning Center for more guidance on pumping schedules.
Sources
- Academy of Breastfeeding Medicine Protocol Committee. (2021). ABM Clinical Protocol #35: Supporting breastfeeding during maternal or child hospitalization. Breastfeeding Medicine. https://www.bfmed.org/assets/ABM%20protocol%2035%20Nov%202021.pdf
- Riddle, S. W., & Nommsen-Rivers, L. A. (2017). Low milk supply and the pediatrician. Current Opinion in Pediatrics, 29(2), 249-256. https://doi.org/10.1097/mop.0000000000000468
- Centers for Disease Control and Prevention. (2026). About breastfeeding. https://www.cdc.gov/breastfeeding/php/about/index.html
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