Certified Breastfeeding Counselor Practice Exam 2026 – Comprehensive Test Prep

Thawing frozen breast milk in the refrigerator or under warm running water is the safest method because these techniques help to maintain the integrity and nutritional quality of the milk. Thawing in the refrigerator allows the milk to defrost gradually and remain at a safe temperature, reducing the risk of bacterial growth. This method also preserves the enzymes and immunological properties of breast milk.

Using warm running water to thaw breast milk is another effective approach, as it provides a gentle and quick thaw without exposing the milk to high temperatures, which can occur in other methods.

Thawing breast milk at room temperature can lead to temperature fluctuations that increase the risk of bacterial growth, making it less safe. The microwave is not recommended because it can create hot spots that might scald the baby and can also damage the milk's beneficial properties, such as antibodies and vitamins, due to uneven heating. These considerations make the refrigerator or warm running water the safest options for thawing frozen breast milk.