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Expert Q&A
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| By Ann Calandro BSN, RNC, IBCLC Lactation Consultant | ||
It was suggested on your Web site that one can add pumped milk to frozen milk provided that the former is not more than the latter. I have some additional questions which I hope you can help me with:
- What about adding freshly pumped milk to milk stored in the fridge?
- It was mentioned that milk stored at 0 to 4 degrees Celsius can be kept for eight days. Other journals usually mention a maximum of two days. Am I interpreting your Web site correctly?
- In your opinion which is the best form of storage device? It was suggested on your Website that one can use Ziploc bags. Do you mean those sandwich bags? Are they sterile?

1) When storing breastmilk, remember that we always want to protect the status quo of the milk already in the refrigerator or freezer. We want to keep it just as cold as it is, and not cause it to warm or thaw. Therefore, it is best to chill milk before adding it to frozen or refrigerated milk. If we add warm milk to any other milk, it will make it warmer and it will not stay as fresh.
2) Fresh breast milk will be good in the refrigerator for eight days. Keep it in the back part of the refrigerator where it will be coldest, not in the front or on the door.
3) Milk stays freshest and preserves more nutrients if kept in a clean, hard-sided container with a tight fitting lid. There are some types of soft sided bags that are designed to store breastmilk. They are very thick, and are specially designed for this purpose. It is not necessary for the containers to be sterile, only clean. The soft-sided containers are not approved for storing milk of premature or sick babies, but are adequate for occasional use in full term, healthy babies.
Hope this helps!
Related Expert Q&A
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- When is it safe to start pumping breast milk for future use?
- Are there any laws pertaining to pumping breast milk at your place of employment?
More Answers by this Expert
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