Pumping Breast Milk for Your NICU Baby: A Practical Guide

Why your milk matters for a preemie

In January 2026 the American Academy of Pediatrics (AAP) updated its recommendations on human milk for preterm babies. It says a mother’s own milk “provides the best short- and long-term health benefits” to very low birthweight infants, and that human milk with fortifiers helps protect premature babies from necrotizing enterocolitis (NEC), a serious intestinal illness. The World Health Organization likewise strongly recommends breastfeeding to improve health outcomes for preterm and low-birthweight babies.

March of Dimes notes that breast milk has vitamins, nutrients, and antibodies, and that it changes as your baby grows, including for babies born early. Babies who aren’t ready to breastfeed or take a bottle may get your milk through a thin feeding tube, and many tube-fed babies go on to breastfeed or bottle-feed.

The AAP also asks NICU teams to support moms with “early and frequent pumping,” immediate access to high-quality double electric pumps, skin-to-skin contact, and peer lactation support. In other words, you shouldn’t have to figure this out alone. Ask for help early and often.

When to start pumping

As soon as you can. Lurie Children’s Hospital tells NICU moms to start pumping as soon as possible after birth, because waiting may limit how much milk you can make. The neonatal team at Children’s Hospital of Philadelphia (CHOP) puts it as “pump early, pump often,” starting within one hour of delivery.

Life doesn’t always cooperate. If you had a C-section, were very sick, or were separated from your baby, you may start later than that. Start when you can, and ask for a lactation consultant or a nurse to show you how. March of Dimes says a nurse or lactation consultant can teach you to pump and help you set up a schedule.

Those first sessions may give you only drops. Lurie Children’s says it may take up to two weeks to build a full supply, so early small amounts are normal.

How often to pump

CHOP’s consensus recommendation is to keep pumping 8 times a day. Lurie Children’s suggests pumping every 2 to 3 hours for the first two weeks, about 8 to 10 times in 24 hours, which is about as often as a newborn would nurse. It adds that the total number of sessions matters more than how long each one lasts.

Things that may help with supply, according to March of Dimes and Lurie Children’s:

• Rest when you can and stay hydrated.
• Empty your breasts at each session.
• Hold your baby skin-to-skin. Lurie Children’s notes that studies show skin-to-skin contact increases milk supply. See our guide to kangaroo care in the NICU.
• Once your supply is established, Lurie Children’s suggests you can try one 5 to 6 hour stretch of sleep at night.

Ask to speak with a lactation consultant if pumping hurts, your breasts are painful, you’re worried about your supply, or your baby is starting to try to breastfeed.

Hospital-grade pumps

March of Dimes says it’s best to use a hospital-grade electric pump, and the AAP calls for NICU moms to get immediate access to high-quality double electric pumps. Some NICUs, like Lurie Children’s, keep a hospital-grade pump in your baby’s room for you to use during the stay. For home, ask your NICU team or lactation consultant about getting a pump. Here are a few places to start:

• Your health insurance. According to HealthCare.gov, Marketplace plans and most other health plans (except grandfathered plans) must cover a breast pump, either a rental or one you keep. Your plan may set rules on whether it’s manual or electric, how long a rental lasts, and when you get it, and some plans need pre-authorization from your doctor. Plans often follow your doctor’s recommendation on what’s medically appropriate, so ask your provider about a hospital-grade pump for a NICU baby.
• Idaho WIC. See Idaho resources below.

Colostrum and mouth care

Your first milk, colostrum, often comes in tiny amounts. Save every drop. Lurie Children’s points out that colostrum has infection-fighting properties.

Even before your baby can eat, those drops can be used. Children’s Hospital of The King’s Daughters explains that you or your baby’s nurse can swab the inside of your baby’s mouth with small amounts of colostrum or breast milk during hands-on care. They say it can help prevent infection, feels good to your baby, and introduces the taste and smell of your milk. CHOP’s neonatal team recommends starting colostrum mouth care within 6 hours of birth. Ask your nurse whether you can do your baby’s mouth care. It’s one of the sweetest jobs in the NICU.

Labeling and storage

Your NICU’s rules come first. Hospitals have their own labels, containers, and storage limits for milk going to the NICU, and they’re often stricter than guidance for healthy babies at home. Lurie Children’s, for example, asks moms to label each bottle with the date and time it was pumped, and notes that safe storage times vary by type of refrigerator or freezer. Ask your nurse for the unit’s labels and instructions before you bring milk in.

For home, the CDC’s general guidelines for freshly pumped milk are:

• Room temperature (77°F or colder): up to 4 hours
• Refrigerator (40°F or colder): up to 4 days
• Freezer (0°F or colder): about 6 months is best; up to 12 months is acceptable

The CDC also recommends:

• Label each container with the date it was pumped.
• Use breast milk storage bags or clean, food-grade glass or plastic containers with tight lids.
• Freeze in small amounts (2 to 4 ounces, or one feeding’s worth) and leave about an inch at the top.
• Cool fresh milk before adding it to milk that’s already cold or frozen.
• Thaw the oldest milk first, never refreeze thawed milk, and never thaw or heat milk in a microwave.

Donor milk

If your own milk isn’t available, or there isn’t enough yet, your baby’s team may recommend donor milk. The AAP recommends pasteurized donor human milk from screened, approved donors when a mother’s own milk isn’t available. It says donor milk doesn’t offer all the same benefits as a mother’s own milk, but it can be an effective alternative. WHO calls donor human milk “the best alternative” when mother’s milk isn’t available.

March of Dimes explains that milk banks test donated milk and pasteurize it before sending it to hospitals. The AAP advises against informal or internet milk sharing for high-risk babies. Ask your NICU team whether donor milk is an option for your baby.

If pumping doesn’t work out

Please hear this: if pumping is not working for you, whether because of supply, your health, your other children, or simply what you can carry right now, you have not failed your baby. The AAP itself says that if neither your milk nor fortified donor milk is available, or if parents choose not to use donor milk, preterm infant formula is recommended for very low birthweight babies. March of Dimes notes that your NICU team can recommend a formula and explain how to prepare it.

Some moms pump for a few days, some for months, some give a mix of milk and formula, and some don’t pump at all. A fed baby and a mom who is okay are what matter. If pumping is wearing on your mental health, tell someone on your care team. Our guide to NICU parent mental health has more support.

Idaho and Boise resources

• Your hospital’s lactation consultants. Ask your baby’s nurse to connect you with a lactation consultant. March of Dimes notes they can show you how to pump and help you set up a schedule.
• Idaho WIC. The Idaho Department of Health and Welfare says that, when needed, WIC will supply breast pumps and other equipment to help moms provide milk for their babies. WIC also offers free consultations with breastfeeding professionals, including board-certified lactation consultants, plus peer counselors who are moms who have breastfed their own children. Eligibility depends on Idaho residency and income. In the Boise area, Central District Health lists (208) 327-7400 for its Boise, Meridian, and Kuna WIC offices.
• St. Luke’s Human Milk Donation Centers. If you end up with more milk than your baby needs, St. Luke’s lists Human Milk Donation Centers (drop-off sites) at St. Luke’s Children’s Hospital in Boise, St. Luke’s Meridian Medical Center, and St. Luke’s Magic Valley. The milk is shipped to community milk banks, which St. Luke’s names as the Rocky Mountain Mothers’ Milk Bank in Denver and the Mountain West Mothers’ Milk Bank in Salt Lake City, for screening and processing. Donors go through the milk bank’s screening first, so start there, and call ahead to confirm drop-off details.

For more local help, see our Treasure Valley NICU resources. If you’re putting together something for a pumping mom, our NICU care package ideas can help. Our Mother’s Day baskets for NICU moms are made possible by people who donate.