Hi Twiglett, not sure about cycle lengths as I think all women do vary. My cycle, before clomid, was anything up to 8 weeks. On clomid, it was reduced to a very average 30 days. This is only my second cycle so I am not sure but am probably on in a couple of days. I was led to believe clomid would spark off ovulation up to 9 days after the last tablet (so, In amy case, day 14/15) and then AF would follow 14 days after that, but it is not a precise science so we all differ a little. Cant be more help I'm afraid.