Breastfeeding

Collection, Storage and Use of Expressed Breastmilk for Well Infants

Breastmilk collection

  • Wash your hands before pumping.
  • Make sure you use a clean collection kit. Follow the directions that came with your pump for cleaning pump parts between each use.
  • Sit comfortably. Think about your baby or look at a picture of your baby. Relaxation techniques can help increase the amount of milk removed from the breast.
  • Apply a warm wet cloth for a few minutes before pumping to help with milk release from the breast.
  • Gently massage the breast before and during pumping to increase the amount of milk removed.
  • Check to make sure the flange (the piece that fits over the nipple) is the correct size when pumping milk. Your nipple should not rub the barrel or appear tightly squeezed when the pump is on. The wrong flange size can lead to decreased milk production and pain with continued use.
  • If your pump has a vacuum control, use only as much suction as is needed to keep milk flowing.
  • Pumping usually takes 10 to 20 minutes per side for a single pump. Double collection kits will decrease the amount of time needed for pumping to approximately 15 minutes total.

Storing your breast milk

  • Pumped milk may be stored in standard baby bottles (glass or plastic). Special bags are also available for human milk storage for home use. Squeeze air from the top of bags before sealing. Seal bags with a twist tie or clamp and place upright to prevent leaking. Label each collection container with the date the milk was pumped.
  • Milk will expand during freezing.so fill container ¾ full. You may combine milk from two different pumping times if needed. Chill the fresh pumped milk in the refrigerator. Then add it to milk already cooled or frozen. Store only two to four ounces per container so you don't want waste milk by having to thaw more than you need!
  • To transport milk, place it in an insulated bag or cooler with a frozen cold pack.
  • "Fresh" breast milk contains the most active anti-infective properties, followed by refrigerated, and then frozen breast milk.

Human milk storage guidelines for well infants:

Clinical Trial / Research Study:

Fresh milk at room temperature 4 hours
fresh milk refrigerated (4°C, 39°F) 3-5 days
frozen milk in freezer section of refrigerator with separate door 3 months
Frozen milk at 0° F (-19° C) or lower 6-12 months
frozen milk thawed in refrigerator 24 hours
milk left in bottle after infant has begun feeding do not store for later use

Handling and use of expressed milk

  • Wash your hands before handling milk.
  • The oldest milk should be used first.
  • Thaw breast milk by placing the collection container in the refrigerator for several hours or overnight.
  • Do not refreeze milk once it has been thawed.
  • To warm refrigerated or frozen milk hold the container of milk under warm running water. You may also place it in a container of warm water. The water level should not touch the bottle lid or top of the bag.
  • Milk should never be warmed in the microwave. The microwave can create hot spots in the milk. Microwaving or heating milk in very hot water may also decrease the anti-infective properties of human milk.
  • Your milk separates during storage and the cream (fat) rises to the top. Gently swirl the bottle of milk to mix it. Avoid vigorous shaking.

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Rev. 8/07