Hi - I realize this is an older post, and so I don't know if you're still TTC - maybe you're happily pregnant by now:) But if not, I highly recommend using a digital ovulation test. The individual tests (not the sticks that go with the big huge monitor) from Clear Blue are easy to use and will pinpoint when your LH surge is instead of trying to plan around a calendar. It just gives you a better "window" Best of luck!View Thread