How to Increase Breast Milk Supply While Pumping
How to Increase Breast Milk Supply While Pumping
You sit down, attach your pump, watch the bottles…and wait.
Maybe you used to pump 4 ounces and now you're getting 2. Maybe you're pumping what feels like all day but aren't seeing an increase. Or maybe you've recently returned to work and suddenly your freezer stash is disappearing faster than you'd like.
First, know this: the amount you pump during one session does not tell the whole story about your milk supply.
Milk production is influenced by several things, including how often milk is removed, how effectively your breasts are being drained, your baby's feeding pattern, your pump and flange fit, and your individual breast storage capacity.
So instead of asking:
“How do I make more milk?”
It can be more helpful to ask:
“How can I help my body receive a stronger signal to make more milk?”
Let's break it down.
Think of Milk Production Like a Bakery
Imagine your breasts are a tiny bakery.
When customers keep buying what's on the shelves, the bakery gets the message:
We're selling out. Make more!
But if the shelves stay full for long periods, the bakery starts thinking:
We're making more than anyone is buying. Slow production down.
Your breasts work in a similar way.
Regular and effective milk removal tells your body that milk is needed. When milk remains in the breasts for longer periods, production may gradually slow.
That's why one of the first things we look at when trying to increase milk production is milk removal.
1. Figure Out How Often YOU May Need to Remove Milk
You've probably seen recommendations telling breastfeeding parents to pump every three hours.
That's a helpful starting point, but it isn't a magic schedule that works for everyone.
Some parents can maintain a full milk supply with fewer milk removals. Others need more frequent breastfeeding or pumping.
One reason is breast storage capacity—how much milk your breasts can comfortably store between milk removals.
Lactation expert Nancy Mohrbacher describes this concept using the “Magic Number.”
Your Magic Number is essentially the number of effective milk removals you may need in a 24-hour period to maintain your milk production.
And here's the important part:
Your number may not be your friend's number.
One clue is your largest milk removal.
Your maximum pumping output can give us some information about storage capacity, although it shouldn't be used as a perfect measurement or diagnosis.
For example, someone whose largest pump is only a few ounces may need more frequent milk removal than someone who can comfortably remove a much larger amount at one time.
Rather than chasing someone else's pumping schedule, pay attention to your own pattern.
Ask yourself:
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How many times was milk being removed when my supply was doing well?
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Has that number recently decreased?
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Did I return to work?
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Did my baby start sleeping longer?
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Did I drop an overnight pump?
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Am I going longer between pumping sessions?
Sometimes the missing piece isn't another supplement, drink, cookie, or complicated pumping trick.
Your body may simply need more milk removals.
👉 Learn more about finding your Magic Number
2. If You Want More Milk, You May Need to Ask for More Milk
Your body can't read your mind.
It doesn't know you're trying to build a freezer stash for daycare next month.
It responds primarily to what is happening now.
If milk is removed frequently and effectively, you're giving your breasts the message:
“We need this milk. Keep making it.”
For many parents working to increase production, this may mean temporarily increasing breastfeeding and/or pumping frequency.
Depending on your individual situation and postpartum stage, that might look like:
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Breastfeeding your baby on cue
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Pumping approximately every 3 hours during the day
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Avoiding very long stretches between milk removals
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Adding a pumping session after a breastfeeding session
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Adding additional sessions when appropriate
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Including nighttime milk removal, particularly during the early weeks postpartum
You don't necessarily need to follow this routine forever.
Think of it like placing a larger order at our imaginary bakery. You're trying to show your body that demand has increased.
3. Don't Forget About Nighttime
Yes, sleep matters.
And no, we're not suggesting that every breastfeeding parent needs to wake up every two hours indefinitely.
But nighttime milk removal can be important, particularly while milk production is still being established.
If your baby suddenly begins sleeping longer stretches and several milk removals disappear from your day, your body may eventually adjust production downward.
During roughly the first 12 weeks postpartum, some parents may benefit from continuing nighttime milk removal while establishing or increasing supply.
After that, the plan can often be adjusted based on your supply, your baby's feeding pattern, your storage capacity, and your goals.
More pumping isn't automatically better.
The goal is enough effective milk removal for your body—not exhaustion.
4. Before Adding More Pumping Sessions, Check Your Flanges
Imagine trying to drink a thick milkshake through a straw that's pinched.
You could suck harder.
You could drink longer.
You could try again every three hours.
But the problem isn't your effort.
The equipment isn't allowing things to work efficiently.
The same idea can apply to pumping.
A poorly fitting flange may cause discomfort and can interfere with effective milk removal.
Your flange should feel comfortable.
During pumping:
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Your nipple should move freely inside the flange tunnel.
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Large amounts of areola shouldn't repeatedly be pulled deep into the tunnel.
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Pumping shouldn't cause persistent pain, pinching, swelling, or nipple damage.
And here's something that surprises many parents:
The flange that came with your pump isn't necessarily your size.
Many pumps include 21 mm, 24 mm, or larger flanges. Plenty of parents need smaller sizes.
How to measure your nipples for a flange
Measure the diameter of the nipple itself at the base—not the areola.
For the most useful measurement, consider measuring before pumping or breastfeeding, or after the nipple has had time to return to its resting size.
You can use our Printable Flange Sizing Guide as a starting point.
Don't assume your flange size will stay the same.
Here's something many pumping parents aren't told:
Your flange size can change during your pumping journey.
The flange that worked well several months ago may not be the best fit today.
As your body changes postpartum, your nipples and breast tissue can change too. That's why we recommend checking your flange size approximately every 2 months, or sooner if pumping suddenly becomes uncomfortable or your output changes.
Time for a flange check?
Measure both nipples—they aren't always the same size.
Then find the flange or insert that fits your current measurements:
👉 [SHOP THE CORRECT FLANGE SIZE — FLANGE LINK ]
A small sizing adjustment can make pumping much more comfortable and may help improve milk removal.
5. Turn Your Pump Into a Tool, Not a Torture Device
Here's one pumping myth we would happily retire:
“Turn the suction all the way up to get more milk.”
Ouch.
Higher suction does not automatically mean more milk.
Your goal is to find the combination of cycle speed and vacuum that encourages your milk to flow comfortably.
Think about drinking from a straw again.
Sucking as hard as physically possible doesn't necessarily make the drink come out better. Eventually, you're just hurting your cheeks.
Your breast pump works similarly.
Try this approach:
Start with comfortable stimulation.
Once milk begins flowing, adjust your pump gradually.
Watch your milk—not just the numbers on the screen.
If increasing suction or changing cycle speed creates better milk flow and still feels comfortable, great.
If milk flow doesn't improve—or the setting hurts—go back.
Your best pump setting is the setting that gets YOUR milk flowing comfortably.
There is no single perfect Spectra setting, suction level, or pumping program for every parent.
👉 Using a Spectra pump? Check out this Spectra Pump Settings Guide to better understand your pump's settings.
6. Give Your Breasts a Little Help
Your pump doesn't have hands.
You do.
Breast massage and compression can help some parents remove milk more effectively.
Before pumping, try gently massaging your breasts. You can also hand express until you begin seeing drops of milk.
During pumping, use gentle breast compression in areas that still feel full.
This technique is often called hands-on pumping.
Think of your pump as one member of the team.
Pump + your hands + good flange fit = a much stronger lineup.
Some parents also find that hand expression after pumping helps remove additional milk.
👉 Watch a hands-on pumping demonstration
7. Don't Race the Clock
You've been pumping for exactly 20 minutes.
The timer goes off.
Are you done?
Maybe. Maybe not.
Twenty minutes isn't a universal finish line.
Some parents remove most of their milk in 15–20 minutes. Others need 25–30 minutes or longer.
Instead of watching only the clock, occasionally pay attention to what your breasts and milk flow are doing.
You may experience multiple letdowns during one pumping session.
Milk might flow…
slow down…
and then begin flowing again.
At least once, give yourself enough time to observe your complete pumping pattern. That can help you understand how long your body typically needs.
Longer pumping isn't always better, either. If you're regularly pumping for very long periods without good milk removal, it's worth investigating why rather than simply spending more time attached to the pump.
8. When Was the Last Time You Replaced Your Pump Parts?
Sometimes your milk supply isn't the only thing that has changed.
Your pump parts wear out too.
Valves, membranes, duckbills, backflow protectors, tubing, and other components can affect how well your pump performs.
If your pump suddenly feels weaker or your output has decreased despite no major changes to your routine, inspect your pump parts.
Think of your breast pump like your car.
You wouldn't drive thousands of miles and assume the tires, oil, and brakes never need attention.
Your breast pump also needs maintenance.
If you're pumping regularly, keep replacement parts available so a worn duckbill or membrane doesn't derail your pumping day.
👉 Shop Breast Pump Parts & Accessories at The Pumping Solution
We carry pumping supplies and replacement parts from popular brands so you can replace the pieces you need without replacing your entire pump.
9. What About Water, Oatmeal, Lactation Cookies and Supplements?
Here's where pumping advice can get noisy.
Drink this.
Eat that.
Buy these cookies.
Take this supplement.
Hydration and adequate nutrition absolutely matter for your overall health. Drink according to thirst and make sure you're eating enough to support yourself.
But drinking gallons of water isn't a substitute for effective milk removal.
Before spending money on products promising to dramatically increase milk production, start with the fundamentals:
Frequency + effective milk removal + appropriate flange fit + effective pump settings.
Those aren't as exciting as a magical pink drink.
But they're much more useful places to start.
10. What If You're Doing Everything “Right” and Your Supply Still Isn't Increasing?
This is when we stop blaming the pump schedule.
Persistent low milk production deserves a closer look.
There are many reasons someone may experience difficulty establishing or increasing milk production, and simply telling someone to “pump more” isn't always the answer.
A lactation professional can review factors such as:
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Your complete breastfeeding and pumping history
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Your baby's milk transfer
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Flange fit
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Pump function
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Pumping technique
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Frequency of milk removal
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Breast changes and medical history
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Medications or hormonal contraception
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Previous breast surgery
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Postpartum complications
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Other health factors that may affect lactation
When appropriate, your healthcare provider may also determine whether medical evaluation or laboratory testing is warranted.
The important point is:
If increasing milk removal isn't producing the expected response, investigate instead of endlessly adding pumping sessions.
Need someone to look at the whole picture?
Sometimes you don't need another Google search—you need someone to look at your pump, your flange fit, your routine, and your milk output together.
👉 Get Personalized Pump & Flange Fit Support from The Pumping Solution
Our Pump & Flange Fit Support Package provides individualized help so you can stop guessing and make your pumping routine work better for you.
Start With These 5 Things Today
Feeling overwhelmed?
Don't change 15 things tonight.
Start here:
1. Count your milk removals.
How many times are you actually breastfeeding or pumping in 24 hours?
2. Look for long gaps.
Did returning to work, sleeping longer, or a schedule change remove several sessions?
3. Check your flange size.
If it has been around 2 months since you last measured, measure again.
4. Watch your milk flow.
Experiment with comfortable pump settings rather than automatically using maximum suction.
5. Check your pump parts.
If they're worn, stretched, damaged, or overdue for replacement, change them.
👉 Shop Pump Parts & Pumping Essentials
Then give your body time to respond.
Your Milk Supply Isn't a Competition
Perhaps the most important thing we can tell you is this:
Your pumping bottles don't need to look like somebody else's pumping bottles.
Social media can make it seem normal to pump 8, 10, or 12 ounces every time.
That isn't the standard every breastfeeding parent is supposed to reach.
The goal isn't necessarily to create the largest milk supply possible.
The goal is to establish the milk production that works for you, your baby, and your feeding goals while keeping pumping sustainable.
And if something doesn't seem right, you don't have to figure it out by yourself.
Before Your Next Pump, Do a Quick Pump Check
Ask yourself:
When did I last measure my nipples?
Do my flanges still feel comfortable?
When did I last replace my pump parts?
Am I using settings that actually get my milk flowing?
Am I removing milk often enough for my individual supply?
Your pumping needs can change as your body and baby change.
That's why we recommend making a flange-size check part of your pumping routine approximately every 2 months.
Measure. Check your fit. Pump comfortably.
👉 [CHECK YOUR FLANGE SIZE — FLANGE LINK ]
Once you know your current size, you can shop for the correct flange size at The Pumping Solution instead of continuing to pump with a flange that may no longer fit.
Need replacement parts while you're there?
👉 Shop Breast Pump Parts, Flanges & Pumping Essentials at The Pumping Solution
Need more individualized help?
👉 Get Pump & Flange Fit Support
Because sometimes increasing milk supply isn't about finding another trick.
It's about figuring out what your breasts—and your pump—have been trying to tell you.
This information is intended for general breastfeeding and pumping education and does not replace individualized medical or lactation care. If you are concerned about your milk production, your baby's intake, weight gain, or your health, contact your healthcare provider and/or an IBCLC.