I bought about 50 ebay cheapie OPK's to find out if/when I was ov'ing several months before ttc and was rather peeved to find not one of them produced a +ve line - not even a faint one - during the cycles in which I experimented.
I want to start checking for ov again after a cp, and was hoping I could get a few recommendations for reliable OPK's (the cheaper the better of course ).
Anyone have suggestions on the best to try?