Freshly expressed breast milk can safely stay out of the fridge at room temperature (around 25°C or 77°F) for up to 4 to 6 hours, with some sources suggesting up to 6 hours if the room is not too warm. However, if the temperature exceeds about 29°C (85°F), the safe time reduces to around 2 hours. It is best to store the milk in a sterile, covered container and refrigerate it as soon as possible to minimize bacterial growth risks. For premature babies, the limit is stricter, with room temperature time recommended to be only about 1 hour. Breast milk that has been previously frozen and then thawed should only be left out for 1 to 2 hours. Signs of spoiled milk include a sour or off smell, and such milk should be discarded to avoid illness.
Summary of room temperature storage for breast milk:
- Freshly expressed milk: up to 4-6 hours at 25°C
- Very warm conditions (29°C or higher): up to 2 hours
- Previously frozen and thawed milk: 1 to 2 hours
- Premature babies: ideally only 1 hour at room temperature
These guidelines apply to healthy, full-term babies; consult a doctor for special circumstances.
