When Can I Start Pumping and Storing Milk? A Complete Guide for New Moms

Most moms can start pumping and storing breast milk anytime after birth, but the best time depends on your goals.

• Nursing and not returning to work just yet? Many moms wait 3–4 weeks.

• Need milk stored early, returning to work, or pumping exclusively? You can start within the first few days after birth.

There is no one-size-fits-all answer—and that’s normal.

Why Moms Ask This So Often

“When can I start pumping and storing milk?” is one of the most searched breastfeeding questions because moms worry about:

• Hurting milk supply

• Creating nipple confusion

• Not having enough milk stored

• Needing flexibility or sleep

• Preparing for returning to work

The good news: pumping is breastfeeding, and with the right timing, it can support—not harm—your journey.

When You Can Start Pumping (Based on Your Situation)

1. If You’re Exclusively Breastfeeding at First

If your baby is nursing well and you don’t need stored milk right away:

• Many lactation consultants suggest starting pumping around 3–4 weeks postpartum

• This allows milk supply to regulate and breastfeeding to feel more established

That said, some moms pump earlier with no issues—especially for comfort or flexibility.

2. If You Want to Build a Small Freezer Stash

You can start pumping as early as the first week, often:

• Once per day, after a feeding

• Or 10–15 minutes after nursing when breasts still feel full

This gentle approach helps collect milk without overstimulating supply.

3. If You’re Returning to Work

If you’ll be separated from your baby:

• Start pumping 2–4 weeks before returning to work

• Aim to store enough milk for 1–2 days away from baby

• Practice pumping at the times you’ll pump at work

This helps your body and pump routine adjust ahead of time.

4. If You’re Exclusively Pumping

If pumping is your primary way of feeding:

• You can start immediately after birth

• Most exclusive pumpers pump 8–12 times per day early on

• Frequent pumping is key to establishing supply

Support from an IBCLC can be especially helpful here.

When Is It Too Early to Pump?

For most moms, it’s not bad to pump early—but pumping too often or too aggressively in the first weeks can lead to:

• Oversupply

• Engorgement

• Clogged ducts

That’s why timing and frequency matter more than the exact day you start.

How to Start Pumping Safely (Early Postpartum)

If you’re pumping in the first few weeks:

• Use low suction and gradually increase

• Pump after feeds, not instead of them (unless directed)

• Watch your body—pain is a signal to adjust
  

How Soon Can You Start Storing Breast Milk?

You can store breast milk as soon as you pump it.

Breast Milk Storage Guidelines (General)

• Room temperature: up to 4 hours

• Refrigerator: up to 4 days

• Freezer: up to 6–12 months (best quality within 6 months)

Always label milk with the date and amount.

When to Get Extra Help

Consider reaching out to an IBCLC or healthcare provider if:

• Pumping is painful

• You’re unsure how often to pump

• You’re worried about supply

• Your baby isn’t gaining weight as expected

Early support can prevent long-term challenges.

Frequently Asked Questions

Can pumping early hurt my milk supply?

No—pumping removes milk, which signals your body to make more. Problems usually come from too much pumping, not pumping itself.

Will pumping cause nipple confusion?

Most babies switch between breast and bottle just fine, especially when paced bottle-feeding is used.

How much milk should I store before returning to work?

You typically only need 1–2 days’ worth, since you’ll pump while away.

Is pumping considered breastfeeding?

Yes. Breastfeeding includes nursing and pumping. Both nourish your baby with breast milk.

You can start pumping and storing milk whenever it supports your life and your baby. Whether that’s day one or week four, the “right” time is the time that works for you.

Next Step for Pumping Moms

If pumping is part of your feeding plan, learning how to protect supply, store milk safely, and build a routine can make the journey smoother and more sustainable.