After and egg has been fertilized how long does it take for conception?

Depends: This of course is a matter of definition (if not religion and politics, as well). Generally, it is consider for these reasons an imprecise word. For most, the timing of fertilization is the conception where an ovum (egg) melds with a sperm resulting in a zygote--the first structure capable of creating life. This happens between 12 hours to more than 100 hours afer sex.