Before feeding the frozen breast milk in the refrigerator to the baby, it needs to be thawed properly: 1. Frozen breast milk can be placed in the freezer of the refrigerator about 6-8 hours in advance to thaw slowly, or frozen breast milk can be placed in flowing cold water to thaw. The faster the breast milk is thawed, the lighter the fishy smell will be. 2. Thawed breast milk cannot be fed directly to the baby, it needs to be gradually heated in a milk warmer or warm water at about 40-50°C to make the temperature about 37-40°C before feeding the baby. 3. It is generally not recommended to heat breast milk in a microwave oven, which on the one hand can easily lead to uneven heating and can cause burns to the baby. On the other hand, it is easy to make the nutrients in breast milk be destroyed.