How to safely store breastmilk

According to the AAP and the Centers for Disease Control and Prevention (CDC), freshly expressed or pumped milk can be stored at room temperature for up to 4 hours; in the refrigerator for up to 4 days; or in the freezer for up to 12 months. However, a maximum of 6 months in the freezer is recommended. Heat-pasteurized donated breastmilk needs to be consumed within 3 months. Hand hygiene is very important to remember before pumping or expressing and while preparing milk for storage.

Use containers expressly made for storing breastmilk and make sure they are tightly closed before storing them. Always note the date the milk was expressed or pumped, and store no more than 4 ounces in each container to avoid having to throw out unused milk.

Using glass containers, BPA-free plastic containers or bags, or the pitcher method are all considered good options for storing breastmilk. The pitcher method involves collecting milk from multiple pumping sessions in a 24-hour period in a single pitcher kept in the refrigerator. This can enhance the consistency of nutrients and save time. At end of the 24-hour period, the milk should be separated into storage containers, dated and placed in the freezer. Remember to stir the contents of the pitcher before separating the breastmilk into containers and freezing them.

Color changes and separation of the creamy, fattier milk from the waterier properties of breastmilk is normal. You will see your milk go from clear; to yellow, thick colostrum; to transitional milk, which is yellow but has more volume; and then to the mature milk, which takes on a white milk appearance.

Milk color and flavor can also change based on the lactating parent’s diet. A varied diet contributes to less fussy eaters when the baby begins to eat solid foods because they have been exposed to different flavors during breastfeeding or breastmilk feeding.

Breastmilk is usually very stable when you follow storage guidelines. However, it’s important to remember:

• Women taking some medications, including some HIV medications and drugs used to treat cancer, should not freeze or use their own breastmilk to feed a baby.

• Milk pumped when drinking alcohol or using recreational drugs should not be given to a baby and should not be stored.

• Milk pumped during a nipple thrush infection, also known as a yeast infection, may need to be discarded because the fungus is not killed in the freezing process. During infection, women should talk with their doctor about prompt treatment for both mother and baby, as it's a shared infection, and the use of stored milk after successful treatment.

Transporting milk can be safely done in an insulated cooler or cooler bag with frozen cooler packs to keep milk cool before its use. Milk thawed in a refrigerator or cooler with frozen packs needs to be used within 24 hours. Refreezing milk isn’t recommended.

Many people throughout the centuries have milk-shared. And when sharing with people you know and love, it’s easier to accept milk without putting it through the pasteurization process because you know the donors’ histories and lifestyles.

However, the AAP does not recommend informal milk sharing, especially if a donor if unknown, because of the increased risk of exposing infants to diseases, medications, alcohol, illegal substances or other contaminants. If you do choose to use informally donated milk, it’s important to ask the following questions:

• Is the milk donor willing to share health or lifestyle information that could possibly impact the safety of their milk?

• Does the donor use any substances, such as tobacco, alcohol, drugs, medications or supplements that could be present in the milk?

• Is there a cost to buy or ship the milk?

• What protocols are used to collect, store and transport the milk safely?

Breastmilk can also be purchased at area milk banks. Milk bank donors go through extensive evaluation and testing to ensure they are healthy before being allowed to donate milk. The milk is also tested and goes through a pasteurization process before being sold or donated.