With PCOS, you may produce the LH hormone multiple times per cycle without actually Oing.
And I only know that because I had my books out to answer the question in the other post, so sorry I can't elaborate Maybe you can google? I wonder if people just get it on for every surge and hope one of them is the right one?
You'll be surprised how fast that gets old and becomes a chore. Thousands of women have PCOS - I'm sure there's some info out there on how to conceive with it, so I'd google.