I haven't done any kind of treatment except the progesterone (and aspirin and folic acid on the grounds that they can't hurt and could help, and put DH on a boatload of supplements). My REs seem to think my ovulation is ok-- I'm not sure what they're basing that on but I do ovulate regularly and get pregnant easily. They did an ultrasound where they looked at my ovaries, and an HSG to see the whole system, so to speak. That was neat. To be honest, I've had so many blood tests done that I'm not sure about all of them anymore-- I can't remember if they did TSH. I think they did. I know they did the thyroid one (twice actually), as I was very interested in that because my mom has hypothyroidism and it caused her at least one miscarriage. EVERY test they did on me except the prog. came up normal-normal-normal.
Wrt the thyroid thing, I would go back and check, especially if you have thyroid issues in your family. Many REs say your TSH level is fine even if it is slightly high, but even a slightly high TSH level can mess your cycles up. And most REs don't check antibodies unless the TSH is off, which is dumb because your TSH could be totally normal and you could still have Hashimoto's thyroiditis (which is what I have). My TSH did test within the lab's definition of the "normal" range, but it was actually high because the real normal range has been revised downwards. But it still didn't look like a huge issue until my doc also tested my antibodies, which were through the roof.