What are the age limits and fsh limits and does it matter if you already have children? My youngest is 14 and we have been ttc for 13 months now, it's his count doctor wants to try IUI first and then IVF, what is the process. My age is 39 just turning next week and my fsh is 6.3, everything seems to be fine with me, ovulating normal every month, regular periods, etc.