Hi S.,
I was trying to have a baby for a couple of years, and had a miscarriage within that time. I found out that I ovulate very late in my cycle, day 30 or so, with a cycle length of 30-31 days. I am 6 months pregnant now, but since I ovulated so late it took a while to get a positive pregnancy test. In fact, I was about to start med. to jump start my late period so that I could start Clomid; I was one day away from it, and had a negative pregnancy test from the Doctor's lab, believe it or not, when I decided to take one more early detection test which said I was pregnant.
My doctor did not subscribe to the belief that late ovulation was a symptom of anything, but there are other doctors who believe that it's connected to low progesterone production, which can also lead to miscarriage. Since I had a miscarriage that also had a late conception date (by ultrasound dating), I decided on my own to use progesterone cream through about 16-18 weeks pregnant. There's no way to tell for sure that it helped me, but I believe it did and it can't hurt. You just want to tell your doctor (it was hard for me to tell her since she didn't think it played a role), and when you go off of it, go off slowly. Lots of doctors do prescribe it, but they also are testing progesterone levels. I had one test of my progesterone, to see if I'd ovulated, and it was at borderline low, which was low enough for me to think it could be helped by supplementing. I had other signs of low progesterone in my life as well.
anyway best wishes and I hope you have some good news soon!