When it comes to storing breastmilk, one common question new moms have is whether you can put breastmilk straight into the fridge after pumping or if it needs to be cooled first. The short answer is yes, freshly pumped breastmilk can go straight into the refrigerator without needing to be cooled down first. However, there are some best practices to follow when refrigerating breastmilk right after pumping to help preserve nutrients and avoid waste.
Quick Overview
Here is a quick overview of the key points on refrigerating freshly pumped breastmilk:
- It is safe to put breastmilk directly into the refrigerator or freezer soon after pumping. You do not need to let it cool down first.
- Get the breastmilk into the fridge as soon as possible, within 1-2 hours after pumping.
- Store breastmilk towards the back of the fridge, not on the door where it will be exposed to more warm air when opening/closing.
- Breastmilk can be stored in the refrigerator for up to 4 days at temperatures of 39°F or lower.
- Label milk storage bags or containers with the date pumped before refrigerating.
- Quickly chill any leftover breastmilk after feeding baby by putting back into the fridge or freezer.
Why Put Breastmilk Straight Into the Fridge?
Freshly pumped breastmilk is still warm from your body heat. You may think letting it cool down first would be better, but getting the milk into the refrigerator as soon as possible actually helps preserve more nutrients and antibodies.
Cold refrigerator temperatures help slow down the growth of bacteria. Storing milk in the back of the fridge where it is coldest gives it the longest shelf life before nutrients start to break down.
Letting freshly pumped milk sit out at room temperature causes the fats in breastmilk to separate faster. The antibodies and nutritional content also start to degrade more rapidly at warmer temperatures compared to colder fridge temps.
Time is of the Essence
Getting pumped milk into the fridge fast is key. The general rule is to refrigerate or freeze breastmilk within 1-2 hours after pumping. Bacteria starts growing rapidly in breastmilk left out for longer than 4 hours at room temperature.
If you will not be able to refrigerate pumped milk within 1-2 hours, it is best to put it in the freezer or cooler bag with ice packs right away to maintain proper temperature.
How to Refrigerate Freshly Pumped Breastmilk
Follow these steps when refrigerating breastmilk right after pumping:
- As soon as you are done pumping, cap the milk storage bags or bottles tightly.
- Label the storage containers with the date and time you pumped. This helps with using the oldest milk first.
- Place milk bags flat or bottles upright towards the back of the refrigerator, not the door.
- Use milk within 4 days when stored in a refrigerator at 39°F or colder. See chart below for freezer timelines.
- Do not save any leftover milk from a feeding. Toss any milk baby does not finish within 2 hours.
Proper labeling is very important since refrigerated breastmilk has a shorter shelf life than frozen. Rotating your supply and using the oldest milk first helps prevent waste.
Breastmilk Storage Guidelines
Storage Location | Temperature | Storage Time |
---|---|---|
Countertop, table | Room temperature (up to 77°F) | 4 hours |
Refrigerator | 39°F or colder | 4 days |
Freezer section inside refrigerator | 5°F | 2 weeks |
Freezer section outside refrigerator | 0°F | 6 months |
Chest or deep freezer | -4°F | 12 months |
These timelines are general storage guidelines from the CDC and Academy of Breastfeeding Medicine Protocol. Always check breastmilk for signs of spoilage like odor or color changes before feeding.
Storing in Refrigerator vs. Freezer
For longer storage, freezing is best for preserving breastmilk nutrients. However, if you plan to use the milk within 4 days, the refrigerator works fine.
The convenience of refrigerating pumped milk is that it thaws faster when ready to use for feeding. It does not require defrosting like frozen milk in the freezer.
However, since the refrigerator is accessed more often, temperature regulation can be trickier. Make sure your refrigerator is maintaining a temperature of 39°F or below. This keeps milk as cold as possible.
Thawing & Warming Refrigerated Milk
To warm refrigerated breastmilk for your baby’s feeding time:
- Take milk out of the refrigerator and gently swirl the milk bag or bottle to mix any separated cream back together.
- Place in a bowl of warm water, under warm running water, or in a bottle warmer to gently raise temperature.
- Avoid microwaving bottles directly as this can create hot spots and damage nutrients.
- Test temperature before feeding to baby – it should be lukewarm, not hot.
- Use thawed milk within 2 hours.
Safe Refrigerator & Freezer Temperatures
To safely store breastmilk, maintain proper refrigerator and freezer temperatures. Here are the ideal temp ranges:
- Refrigerator: 39°F or colder
- Freezer section inside refrigerator: 5°F
- Standalone freezer: 0°F or colder
- Deep freezer/chest freezer: -4°F
Place an appliance thermometer in your fridge and freezer to monitor the interior temperature. Adjust the temperature settings as needed to maintain ideal cold temps.
The refrigerator temperature should be set at or below 39°F. Freezers should be 0°F or colder. Standing freezers tend to maintain temperatures more consistently than refrigerator freezers.
Tips for a Colder Fridge & Freezer
- Allow air circulation inside by not overpacking shelves.
- Keep fewer items in the door bins.
- Make sure seals around doors are clean and tightly closed.
- Don’t open fridge or freezer doors more than necessary.
- Let hot foods cool down first before refrigerating.
- Defrost as needed to prevent ice build-up.
Signs Breastmilk is Bad
Even when stored properly in the refrigerator or freezer, breastmilk can eventually spoil. Here are signs that refrigerated or frozen breastmilk may be bad and should be discarded:
- Smell: Rancid or sour aroma
- Color: Pink, yellow, green, or grayish tones
- Texture: Curdled, chunks, excessively watery
- Taste: Sour flavor
- Expired: Stored past recommended timelines
Normal breastmilk varies in color from light yellow to creamy white. It may separate into a watery layer with a thick, fatty layer when refrigerated which is normal. Gently swirl to mix it back together before feeding.
When in Doubt, Throw it Out
Freezing breastmilk does not kill bacteria from improper storage, so impacts from spoilage can still occur after thawing. If you have any doubts about the safety of pumped milk based on smell, taste or appearance – err on the side of caution and discard the milk.
Proper Handling & Rotation Key for Fridge Storage
Refrigerating freshly pumped breastmilk helps preserve valuable antibodies and nutrition compared to letting milk sit out at room temperature. However, proper handling and rotation practices are still key to maximize its fridge shelf life.
Make sure to:
- Chill milk in the fridge within 1-2 hours of pumping.
- Use oldest milk first to prevent waste.
- Store milk towards the back where temps are coldest.
- Keep the refrigerator temp at or below 39°F.
With the right refrigeration temperature and storage habits, breastmilk can retain its nutritional content for the typical 4 days needed before next pumping session. This makes directly refrigerating breastmilk an efficient way for nursing mothers to store freshly pumped milk.
Frequently Asked Questions
Does breastmilk need to be cooled first before refrigerating?
No, it is safe to put freshly pumped breastmilk into the refrigerator or freezer immediately without letting it cool down first. Cooling milk to room temperature before refrigerating can allow bacteria growth.
How long can breastmilk sit out before refrigerating?
The general rule is to refrigerate or freeze breastmilk within 1-2 hours after pumping to limit bacterial growth. Leaving breastmilk out for longer than 4 hours is not recommended.
Can I freeze breastmilk without refrigerating it first?
Yes, you can freeze freshly pumped breastmilk without refrigerating it first if needed. However, freezing breastmilk right after pumping may help better preserve some of the live cell properties compared to leaving milk sitting out.
Does breastmilk expire in the refrigerator?
Yes, breastmilk stored in the refrigerator has a shelf life of up to 4 days when stored at proper cold temperatures of 39°F or lower. After 4 days, certain nutrients in refrigerated breastmilk start to degrade or risk spoilage from bacteria.
How do I thaw refrigerated breastmilk?
To thaw and gently warm refrigerated breastmilk, you can place the sealed container in a bowl of warm water or under warm running water until thawed and lukewarm. Avoid microwaving directly. Swirl milk to remix any separated cream before feeding.
Can I reuse breastmilk that my baby did not finish?
It is not recommended to save or reuse any breastmilk that your baby did not finish during a feeding. Any leftovers should be discarded within 2 hours after the feeding starts to limit bacterial growth in the milk.
Conclusion
Putting freshly pumped breastmilk straight into the refrigerator is perfectly safe. In fact, chilling breastmilk as soon as possible helps preserve immune properties and nutritional value compared to letting milk sit out after pumping. Just be sure to store breastmilk towards the back of the fridge where temperatures are coldest and use milk within 4 days for maximum freshness. Following proper refrigeration guidelines and labeling pumped milk with the date allows you to conveniently store breastmilk in the refrigerator between pumping sessions.