Hey ladies... so this is my first step into the fertility charting world... my first MONTH actually !LOL!! I had to use the calculator because of an off time for two of the days... CD 12 being one of them... by adjusting CD 12 my cross hairs showed up.... so what's up with the temp drop at 10DPO... Just curious... oh and I'm 1 hour into holding my urine for 4 hours to test!