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Storing Milk  

Next step is storing the milk. Refrigerator or freezer?   If you are a back to work full time pumper you will be freezing for sure.  If you are only making occasional bottles that will be used within 5 days (some sources say up to 7 days but I feel more comfortable with 5) these can be stored in the fridge. Pay careful attention to milk storage temperature guidelines.  You will be storing milk in either :

 

 

  • Bottles
  • Collection and storage bags

It is important to store milk properly so that you maximize its "shelf life".  Believe me, after all the work you go through to pump it out, breast milk seems as precious as gold...you will not want to throw even a drop of it away.  You  can store milk:

  • At room temperature (66-72 degrees) for 10 hours
  • In an insulated cooler tote or ice chest for up to 8 hours
  • In the refrigerator for 3-5 days
  • In a freezer unit that is contained inside a frig for up to 2 weeks
  • In the freezer for 3-4 months if the freezer freezes ice cream hard and it is stored it in the back or sides of the freezer
  • In a free standing deep freezer for six months to a year

It is also important to thaw milk properly so milk stays fresh and bacteria free. Don't be surprised if the stored milk has separated...just shake it gently after it has thawed and it will look fine.  Here are thawing options:

  • In the evening  you can take milk from the freezer and transfer it into the refrigerator. Defrosting in the refrigerator takes 8-12 hours. Once the milk thaws  you need to use it within 24 hours
  • You can put the bottle or bag in a pan or bowl of warm water for 30 minutes and swish  it around until it is thawed
  • If  you're in a hurry  you can put the bottle or bag under warm running water until it  reaches room temperature
  • You can also thaw milk in a bottle warmer
Make sure you check the temperature of the breast milk before feeding the baby.  The best bet is to tap a bit of milk from the bottle nipple onto the inside of your wrist.  It should feel tepid to the touch-not cold/not hot. 

INFO TIPS:
Leave about an inch at the top of the bottle or bag if freezing milk- the milk will expand when frozen. Freeze milk in small portions- 2-4 oz at a time.

Frozen milk can be transferred from a day carrier to a freezer if it is in an insulated cooler tote or ice chest to prevent any defrosting.

If you are going to be doing a lot of pumping you might want to consider buying a pump that comes with a built in insulated cooler unit.

When freezing breast milk, label the storage containers. Put newest milk in back of freezer and use the oldest milk first.

 

HEALTH ALERTS: Do not use the microwave for defrosting milk - hot spots can burn baby's mouth and microwave can also destroy valuable nutrients.

Once breast milk has been out of the refrigerator for one hour it needs to be thrown away. Throw away any milk that is left over after a feeding.

Always pump into a clean sterile container.

LINKS: For more detail on pumping, storing and thawing breast milk go to www.4woman.gov/Breastfeeding.

 

 

 

 

Select from the topics below:

  1. Meet Megan, our expert
  2. Why pump?
  3. Choosing a pump
  4. Tips for Successful Pumping
  5. Collecting milk
  6. Storing milk
  7. Giving pumped breastmilk to my baby
  8. Choosing a bottle and nipple
  9. Cleaning my pump
  10. Accessory basics for successful pumping
  11. Introducing a bottle
  12. Bottlefeeding basics for dads and others
  13. Using a second hand pump
  14. Letting Big Brother/Sister Help with Feeding
  15. Pumping for Twins or more
  16. Increasing Milk Supply
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NursingMom.com is not a medical website. Educational information from this web site is general in nature and may or may not apply to your specific condition. Do not use this information to diagnose a health condition. The information provided is not a substitute or replacement for medical care or your relationship with your health care provider. Our goal is to help you choose a breast pump and accessories so that you can continue to give your baby the best milk ideally for at least the first year. We have made every effort to provide up-to-date and accurate information, but all information is subject to errors, omissions, and change without notice.