No, if you take a fertilized chicken egg from the refrigerator and give it to a hen to sit on, it will not hatch. The key reason is that refrigeration halts the development of the embryo inside the egg. When chicken eggs are stored in the fridge, the low temperature suspends the embryonic development process, effectively putting the egg in a state of dormancy.
For an egg to develop and eventually hatch into a chick, it needs specific conditions, such as warmth and humidity, which are provided by a brooding hen. When a hen sits on eggs (a behavior known as brooding), her body heat warms the eggs, and the humidity from her body helps maintain the proper environment for embryo development.
If you have fertilized chicken eggs and wish to hatch them, it's essential to keep them at the appropriate temperature (around 99-100 degrees Fahrenheit or 37-38 degrees Celsius) and humidity levels for the full incubation period, which typically lasts about 21 days. This can be achieved using an artificial incubator designed for hatching eggs or by allowing a broody hen to incubate them naturally.