Human milk refers to breastmilk. The time for breastmilk to be kept fresh in the refrigerator is related to the temperature, not more than 48 hours at 4℃, and can be kept up to 6 months at -15℃~-5℃. Unable to breastfeed directly, you can first suck out the milk and store it in a milk bag. Breastmilk is supported for preservation and can usually be kept for 48 hours if placed in a special freezer box in a refrigerator at 0 to 4 degrees Celsius; if placed in a freezer, it can be kept for a longer period of time, up to 6 months in most cases. Although breastmilk supports refrigeration or freezing, but generally try to avoid preservation, so as not to breed bacteria, and before feeding your baby breastmilk, first observe whether the breastmilk is deteriorated and warmed up, the temperature should be selected appropriate temperature.