Pumping for a baby in the NICU: what to track

By Kaya Thomas, founder of Milk Diary

When your baby is in the NICU, pumping can feel like the one thing you can do for them. It's also a lot to keep track of: sessions every few hours, bottles to label, numbers the care team asks about and a body that's still recovering from birth.

This guide covers what's worth logging, how often NICUs usually suggest pumping and how to bring your numbers to rounds. It's not medical advice. Your NICU care team knows you and your baby, so their plan comes first.

Why I wrote this

I've been a NICU mom twice. First with my daughter in 2024 and then with my son in 2026. After experiencing the NICU with my daughter, I couldn't find an app that tracked what mattered to me. So I built the app and I have been using it every day in my second postpartum experience with my son. Milk Diary has helped me keep track of my feeding journey and better stay on top of the targets from our care team.

Why a pumping log helps in the NICU

Frequent milk removal in the first two weeks can make a difference in your overall milk supply. The National Association of Neonatal Nurses says a pumping log helps you track your progress and gives your care team useful information. Your baby's care team may ask how pumping is going so they can note it in your baby's chart. A log means you can answer their questions with real numbers instead of guesses.

It helps you too. When you're running on little sleep, it's hard to remember whether you pumped at 2am or 4am. A log shows the whole day at a glance.

What to log for each session

You don't need to track everything. These are the details NICU teams and lactation consultants most often ask about:

Once a day, add up your 24-hour total and number of sessions. Those are the two numbers you'll be asked about most.

How soon to start and how often to pump

Every NICU has its own plan and every NICU stay is different, so follow the one your team gives you. As an example, the newborn intensive care unit at UNC Health asks mothers to start pumping within 6 hours of delivery, ideally within the first 2, and then to pump every 3 hours to establish supply.

Depending on your recovery from birth, that may or may not be possible. Your best is enough. Most NICUs have access to donor milk to support your baby if your recovery means you can't provide your own milk.

Frequency in the first week seems to matter. A 2023 study of mothers of hospitalized babies found that the mothers who pumped at least 5 times a day by day 5 after birth were more likely to reach a full milk supply, which the study defined as more than 500 mL a day by day 14. Those mothers were also more likely to have pumped at least once between 1am and 5am.

What volume to expect

In the first few days you may get only drops of colostrum. That's normal, and every drop is valuable for your baby. Ask your NICU how they'd like you to collect and label it.

Some NICUs share supply goals. UNC's NICU, for example, uses these 24-hour targets:

These are one hospital's targets, not a grade. Many parents produce less than this and still give their babies milk that matters. If your numbers are lower, it's a reason to talk to your lactation consultant, not a sign you've failed.

Pump close to your baby when you can

Skin-to-skin holding, also called kangaroo care, is encouraged throughout a NICU stay. UNC's NICU encourages mothers to pump at the bedside during or after kangaroo care. Ask your nurse whether your NICU allows pumping at the bedside.

Labeling milk and getting it to the NICU

Every NICU has its own rules for labeling, storing, and delivering milk, and they're strict for good reason: each bottle has to reach the right baby. Ask your nurse for their labels and instructions before you start pumping at home. Keep track of what's in your fridge and freezer and when it expires.

Bring your log to rounds

Before rounds or a lactation visit, have these ready:

When the numbers are hard

Pumping for a baby in the NICU is hard work on top of a hard time. If watching the numbers is making things worse, say so. Your lactation consultant can help you set a goal that works for you, whether that's a full supply, some milk, or stopping when you're ready. Any amount of milk you give counts and so does your mental health.

If you're struggling, you can call or text the National Maternal Mental Health Hotline at 1-833-852-6262, or Postpartum Support International at 1-800-944-4773.

Using Milk Diary in the NICU

Milk Diary is a feeding tracker built by a NICU mom and an IBCLC. It covers everything in this guide:

Your data stays on your device and in your own iCloud. We can't see it, and there's no account to create.

Download Milk Diary free on the App Store

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