It took me 9 months (and no medical intervention) at 40 but the pg ended in an early m/c. Compare this to when I was in my late 20's when it took 3 years to get there (just after stopping clomid). Although we were trying from when I turned 40 (I have a new partner) I was not temping or anything and it just happened. I'm hoping to catch the egg again soon and if not it will be on to IVF for us.