This might sound like a stupid question but I was always curious why women charted and used OPKs? My DH and I just did the regular ole "do it every day for a week" routine. I could see how it could be tiring. So is that why women chart/OPKs to avoid having to do the "every day for a week" bit? Or are there other reasons that I'm totally clueless about? Thanks for your insight!