Breastmilk preservation time varies according to the way it is kept in the refrigerator, ranging from a few days to half a year, the following is the storage time when using different methods: 1.Usually, 0-4℃ refrigerated can be kept for 8 days, but it is generally recommended not to exceed 72 hours to avoid breeding bacteria; 2.If it is kept in the freezer in the freezer box, the shelf life is 15 days; 3.If it is kept in the freezer, the refrigerator door The shelf life is 90-120 days if it is kept in a deep freezer with the temperature below 0℃ and the refrigerator door is not opened frequently. Although breastmilk can support a long storage period, the nutrition of breastmilk may change after a long storage period, and there will be a loss of it, or it may be contaminated by bacteria, which may affect the baby’s health after drinking it. When giving stored milk to infants, you should pay attention that if breast milk is just taken out from inside the freezer, you should wait until it is thawed without hard lumps and becomes liquid before heating it; if it is taken out in the freezer and there are no lumps, you can heat it directly. Pour the breastmilk in the bag into the bottle and then heat the bottle in water, or put the bottle in a milk warmer to heat it directly, or use a thermostatic milk regulator to heat it, but it is not recommended to use the bag to heat it in water directly to prevent the plastic from being unsafe to heat directly.