Why Do Some Women Pump So Much—and Others Struggle?

As a lactation consultant working with postpartum mothers both at home and in the hospital, I’m often asked:
“Why am I not pumping much milk—when my friend can fill a whole bottle in minutes?”

The truth is: milk output during pumping varies widely—and for good reason. It’s not just about milk supply; it’s also about the settings, fit, technique, and even your mental and emotional state during pumping. Let’s walk through the key reasons some moms produce more and why others may need a little troubleshooting.

---

1. Pumping Is Not a Direct Reflection of Supply

Many moms assume that how much milk they pump equals how much milk they have. Not true.
A baby’s suckle is far more effective than any pump. So, if you’re only seeing a few ounces (or drops) while pumping, it doesn’t necessarily mean you have a low supply—it might mean your pump setup needs adjusting.

---

2. Pump Settings: More Is Not Always Better

Many new moms understandably crank up the suction, thinking that stronger suction = more milk.
But high suction can cause discomfort and lead to nipple swelling, which actually blocks milk flow.
Instead, try this:

• Start with a stimulation mode (short, quick cycles) for 1–2 minutes to mimic baby’s initial suckling.
• Switch to expression mode (longer, slower pulls) once letdown occurs.
• Adjust suction to your comfort—a “strong tug” shouldn’t be painful.

Pro tip: If your nipples are white, red, or sore after pumping, the suction may be too high—or your flange may not fit properly.

---

3. Flange Fit Is a Game-Changer

Poorly fitted flanges are one of the top reasons milk output is low.
Your nipple should move freely in the tunnel without rubbing, and the areola should not be pulled in deeply.
Signs your flange may be the wrong size:

• Nipple pain or blisters
• Nipple barely moving in the tunnel
• Poor milk output despite frequent pumping

Many moms do best with 21mm, 24mm, or 27mm sizes, but there are smaller and larger options.
Tip: You may need different sizes for each breast!

---

4. Timing and Frequency Matter

If you go too long between sessions (especially in the first few weeks), milk supply can drop.
Aim for:

• 8–12 times in 24 hours if exclusively pumping
• Pumping every 2–3 hours in the early weeks
• Night pumping at least once between midnight and 5 AM—prolactin (the milk-making hormone) is highest then

Remember, milk removal drives milk production.

---

5. Your Emotional State Affects Letdown

Stress, fatigue, or feeling rushed can interfere with letdown.
Some simple ways to support better letdown while pumping:

• Warm compress or gentle breast massage before pumping
• Look at photos or videos of your baby
• Listen to calming music
• Practice deep breathing for a minute before starting

---

6. Underlying Conditions or Birth Experiences Can Impact Supply

If you had:

• A long or difficult labor
• Retained placenta
• Thyroid issues
• Polycystic ovary syndrome (PCOS)
• Insufficient glandular tissue (IGT)

…you might experience a slower or lower milk supply and benefit from individualized support.
This is where working with an IBCLC or experienced provider makes a huge difference.

---

What I Want You to Know

Some women have a strong letdown reflex and a high baseline supply. Others need more support.
It’s not about doing anything wrong—it’s about learning what works best for you and your body.

Whether you’re pumping full-time, nursing and pumping, or trying to increase your output—there is no one-size-fits-all approach.

If pumping is painful, stressful, or just not going well, you’re not alone. I’ve seen it all—and there are solutions. You deserve to feel supported and confident in feeding your baby.

---

Thinking You Might Need Help?

If you’re unsure about your pump settings, flange size, or milk supply—or just want to better understand your pumping routine—know that these questions are common, and with the right guidance, things often become much clearer.