Many mothers have to express breast milk and save it for their babies for various reasons, for example, if the mother has to take medicine in the next few days, then she can express breast milk and save it in advance. For example, if the mother has to take medicine in the next few days, she can express her breast milk and save it in advance. The most common thing is that the baby is still breastfeeding, but the mother has to go to work, then the mother can only express the breast milk and save it separately, so that even if the mother goes to work, the baby can still drink the breast milk. So how should breast milk be preserved? The first thing that you need to do is to make sure that the bottle is airtight and hygienic, so be sure to use high temperature sterilization before using it. You can put it in the microwave oven for one minute for microwave sterilization, or boil it in water for 3 to 5 minutes. Or we can choose disposable breast milk storage bags, which do not need to be sterilized, but not environmentally friendly ah ~ expressed breast milk can be stored at room temperature for 24 hours at 15 ℃; 19 ℃ to 22 ℃ at room temperature for 10 hours; 25 ℃ at room temperature for 6 hours. If you are not sure, we can also put it in the refrigerator to keep it refrigerated, refrigerated room 0 ~ 4 ℃ refrigerated can be stored for 8 days. To take a little longer, we can even choose to freeze, if the freezer is separate from the freezer, but often open and close the door to get the items, the preservation period of 3 to 4 months. If it is a deep freezer, the temperature is kept below 0 ℃, and do not often open the door, the shelf life of up to 6 months or more. Isn’t it amazing? The breast milk taken out of the room temperature or freezer must be heated with warm water at about 40 degrees before you can give it to your baby. When thawing frozen breast milk, you should first rinse the bottle with cold water and gradually add hot water until the breast milk is completely thawed and raised to a temperature suitable for feeding, or placed in the freezer and slowly thawed and de-iced. Thawed breastmilk must be eaten within 24 hours, not frozen again, and not heated twice.