With my first, I was not temping, and had no clue about how my cycle went. I got a BFP around day 35. With my second, I ovulated around day 30 or 35 (I can't remember - it's been almost 2 years!) and got a BFP about day 45. I usually O late, and I did conceive that way, so it is possible. But we are not particularly fertile people, it seems, because we have been married for 5 and a half years and have had two pregnancies, without ever using birth control. I don't know if that is because of me, or DH, or both of us. There is some research that says that "older" eggs are not as likely to progress to a successful pregnancy, but I don't know if that is true or not.
Anyways, it is possible, and my beautiful little girl is proof of that. She just turned one. :biggrin:
All the best!