I tried for one year before becoming pregnant with my wonderful daughter, Murren. I got my periods back almost two years ago now, but no pregnancy yet. My website has the average listed and I think it is about 2-3 years trying. They didn't include in that whether people took matters into their own hands (IVF, IUI) or not. Everyone is different though. A lot has to do with your mucus, your cycles, your overall health, and the availability of sperm at the appropriate time (tehehe).