I voted 9 - 12. I was 38 when we conceived and 39 when Ela was born.
By the calendar it took 13 months, but we were not in the same place at the same time for 4 of those months. So it actually took us 9 months.
It might have taken us less time had we not been trying for a girl. --You have to time DTD pretty far in advance of ovulation. But it worked, we got our girl!