how long does it take a hen to lay fertile eggs?

[old mill poultry]

I always thought it took 30days to 6 weeks for a roo to mate a hen to get fertilized eggs. One forum I went to says two days. Is this really correct?

 

[jenjscott]

I had one I know was fertile after 3 days. You may be thinking about the fact that you have to wait about 4 weeks before you can be sure that they belong to that rooster if the hen was previoulsy with another rooster.