Pumping 101: When, How, and Why You Might Want To

November 10, 2025
Family with kids

Breast pumping can be a game-changer for many families - whether you’re returning to work, sharing feeding duties, or simply looking for flexibility in your feeding routine.

In this post, we’ll walk through when to start pumping, how to do it effectively, and why you might want to include it in your feeding plan. I’ll also share why reaching out to a lactation consultant can make all the difference in comfort, milk supply, and confidence.

Reasons You Might Want to Pump

Every family’s feeding journey is unique. There’s no “right” reason to pump, only what works best for you and your baby. Here are some common reasons parents choose to pump breast milk:

  • Returning to work or school while maintaining your milk supply
  • Sharing feedings with a partner, caregiver, or family member
  • Building a freezer stash for flexibility or emergencies
  • Supporting milk supply when baby has difficulty latching
  • Exclusive pumping, if that’s what works best for your situation

Whatever your reason, pumping can help you meet your feeding goals on your own terms.

When to Start Pumping

If you’re directly breastfeeding, it’s usually best to wait until your supply is established, typically around 3–4 weeks postpartum, before adding in regular pumping sessions.

However, you may begin earlier if:

  • Your baby is in the NICU or separated from you
  • You’re working through latch or milk transfer challenges
  • You’ve been advised by your lactation consultant or healthcare provider

In those cases, starting to pump within a few hours after birth can help protect and establish your milk supply.

How Often Should You Pump?

If you're supplementing, you should pump every time that your babe receives a bottle.

Consistency is key. Pumping regularly signals your body to keep producing milk. Think of your breasts like an ice machine - every time ice is taken out of an ice machine, it's working to make more. Your body is the same - the more frequently you remove milk, the more milk will be made!

Finding the Right Flange Size

The flange (the funnel-shaped part of your breast pump) is crucial for both comfort and milk flow. If it doesn’t fit properly, you may experience:

  • Nipple pain or pinching
  • Reduced milk output
  • Rubbing or redness after pumping

A lactation consultant (IBCLC) can measure your nipples, help you determine your ideal flange size, and teach you how to adjust your pump settings. Proper fit and technique make a world of difference in comfort and efficiency.

Breast Milk Storage Guidelines

Once you’ve pumped, safe storage ensures your milk stays fresh and nutritious.

Fresh expressed breastmilk is good at room temperature (not in direct sunlight) for 6 hours. It remains safe in the back of the fridge (not on the fridge door) for 5 days. Lastly, it can be kept in the fridge for up to 6months.

Tips for storing breast milk:

  • Label each container with the date and use the oldest milk first.
  • Store in 2–4 oz portions to reduce waste.
  • Thaw milk in the refrigerator or a bowl of warm water - never in the microwave.

When to Reach Out for Help

If pumping feels confusing, uncomfortable, or stressful, you’re not alone  and help is available!

Reach out to a lactation consultant if you experience:

  • Pain or nipple soreness during pumping
  • Concerns about milk supply
  • Difficulty choosing or operating your pump
  • Uncertainty about flange sizing or pumping frequency

A lactation consultant can provide personalized flange fitting, hands-on pump teaching, and individualized feeding support to help you feel confident and comfortable.

You’re Doing Amazing

Pumping can be an empowering way to feed your baby and maintain flexibility in your day-to-day life. Whether you’re a new mom, a working parent, or someone navigating exclusive pumping, remember: you’re doing great.

With the right guidance, equipment, and encouragement, you can build a pumping routine that fits your family’s needs — and we’re here to help every step of the way.

Need Help Getting Started?

If you’d like personalized help with flange sizing, pumping schedules, or milk storage guidelines, our lactation consultant can guide you through every step.

Offering personalized in-home lactation and chestfeeding support in Markham, Stouffville, Pickering, Ajax, Vaughan, Thornhill, Maple, Aurora, Oshawa

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