if my OB couldn't get me pregnant in 12 months, I'd go see a specialist.
My OB is actually mroe proactive than that though, in my 6th month of trying she said "this is my last month w/ you. I'm doing you a disservice by trying every month when you need more help."
I got pregnant THAT month
I thought about lying too, but DH was totally against it and also pointed out that it would be a frivilous expense at that time... well we are 10 cycles (I count cycles b/c they are short as opposed to months) and it will be 6 weeks until I can get an appointment with a specialist. That gets me close enough to a year... DH is totally on board
My ob/gyn just referred me to the specialist for that reason... that they are Reproductive Endocrinologist, since I have Hashimoto's Thyroiditis, and autoimmune disease attacking the thyroid... although I hope this is not the reason we are having a delay in TTC.
Infertility is defined as trying for a year without success, so if you've hit a year, you should probably think about getting help. Personally, we tried for about 18 months before seeing an infertility specialist (I think I was in denial). I was 29 at the time. I think if you are young, waiting 12 months is reasonable. Once you are in your mid-30s, some would probably tell you to at least talk to a doctor about it after 6 months. That could be a regular OB/family practicioner, not necessarily a specialist. It doesn't mean you have to start doing any kind of treatment, but it might be a good idea to make sure there isn't some issue you don't know about that should be addressed. (Actually, it's probably good to have a pre-conception visit with a doctor anyway, even if you're not having trouble TTC). By late 30s, I wouldn't wait more than 6 months.