Can you hatch an egg from your refrighter?

Usually no.

However some refrigerators are not as cold as others or are on a lower setting, and the position in the fridge can make a difference too. Some people store eggs for hatching in their fridge, however to do this a fridge has to be on a fairly warm setting and the egg a long way away from the cold plate. Most fridges are too cold and will kill the egg.

Also if you make a mistake and put the wrong egg in the fridge just pull it out quick, if it has only been actually cold half an hour or so it should still be alright.

If you really have to hatch that egg (ie your drake just up and died and the only eggs are in the fridge) its worth a try. Just candle the eggs at 10-15 days to see whats going on rather than waiting the whole term. Shine a light through the egg so you can see inside it, if you see a network of spidery bloodvessels it's alive, an infertile egg will be empty except for the shadow of a yolk. If you can't tell at ten days wait another few days and try again. Note: it takes a very strong light to do this.

Of course it also depends on the egg ... if its from the shop chances are its infertile.