One Breast Produces More Milk Than The Other When Pumping

One Breast Produces More Milk Than The Other When Pumping

You have been breastfeeding for a few months now, and you noticed that you seem to prefer to nurse on one side over the other.

Perhaps you noticed that one breast produces more milk than the other when pumping.

It is even possible for your breast cup sizes to differ dramatically! Why does one breast produce more milk than the other when pumping? 

One Breast Produces More Milk Than The Other When Pumping

Mothers are all unique, and so are their breasts!

It’s not surprising that many breastfeeding moms find that one breast produces less milk than the other because no one is perfectly symmetrical.

In most cases, both you and your baby will be comfortable, so there’s no need to change it.

However, there might be uneven supply, and you can actually do nothing about them.

You might wish to adjust the milk supply and reduce the discomfort, which makes feeding more effective. 

As per demand and supply, breasts produce milk.

Therefore, the left breast can produce more milk than the right breast if you or your baby prefer it.

This will lead to low production of milk. In response to an increased demand for breast milk from one side, your body produces more on that side.

There are several reasons why a nursing mother has varying amounts of breast milk. The lower growing side is affectionately known as the milk dud or slacker boob. 

1. Is There A Reason For This? 

Breasts are usually not symmetrical. An asymmetric appearance is normal for many human body parts (eyes, feet, hands, ears, etc.).

This is because there are some differences in the milk-producing tissues like alveoli or even a slight difference in the quantity and size of milk ducts. 

It is common for mothers to notice that one breast feels “fuller” than the other, often due to differences in size.

In addition to previous surgery on the breast and previous injury to the breast, there are other less common reasons for this discrepancy. 

Poland Syndrome is rarely responsible for asymmetry.

It is quite proven that one breast is often minor and less developed because of the syndrome.

This can result from missing or underdeveloped muscle tissue on just one side of the body.

It is perfectly normal to have an asymmetrical breast and one that is more milk-producing than the other.

Also see: How To Make Breastmilk Fattier

2. Supply And Demand Are Expressed In This Equation.

When you are pumping breast milk to maintain your supply, a slight variation in milk production between breasts is common and should not be alarming.

However, if you notice that one breast produces significantly less milk than the other, it may be time to address the discrepancy and implement some of these tips. 

It is easy to determine when your one breast produces less milk than the other one when the switch comes to a down position

3. Pump More Often 

With a targeted breast pumping routine, we can correct this uneven milk supply.

Pumpers can quickly resolve this issue, but it takes a bit more effort than if you are solely pumping.

When all the breasts have been fully emptied, wait 10 or 15 minutes before beginning with the other boob for extra minutes.

Then, as you begin to increase the pump frequency and the volume of milk present in the lazy boob, that same breast should realize that it needs to catch up. 


Here, you have reasons why one breast produces more milk than the other when pumping.

Experts believe the most important message from this article is that it is okay if one breast is producing more or less milk than the other one.

The pumping, massaging, and vibrating are simple yet effective methods for fixing this uneven milk supply.

Often, one breast is less responsive to pumping than the other and gives less output.

In addition to the lower-producing breast, hand expression can increase the over achiever’s breast pumping work! 

Frequently Asked Questions (FAQs)

Is there any suitable time that it takes to increase milk supply in one breast?

When you ask your body to increase the milk, it is generally considered the fastest way to increase milk.

The more breast stimulation you give your body, whether by nursing your baby more often or pumping more milk, the more it will know you need it.

It usually takes about three to five days to increase the milk supply. 

If I’m not getting milk, should I keep pumping?

Pumping for 15-20 minutes is the standard recommends, and you.

You are required to pump for this long even if you do not have milk flow every time to stimulate your nipples.

Additionally, pumping at least 5 minutes after your milk flow stops will send your body a signal that more milk is needed, which will increase your supply.

When does the breast refill?

In fact, what is referred to as emptying the breast is when the milk flow slows down so substantially that a significant amount of milk cannot be expressed.

This stage lasts for approximately 20–30 minutes before the breast begins to “fill up” again, i.e., the milk flow increases.

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Iesha Mulla

Iesha is a loving mother of 2 beautiful children. She's an active parent who enjoys indoor and outdoor adventures with her family. Her mission is to share practical and realistic parenting advice to help the parenting community becoming stronger.

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