Your most fertile days are the few days before ovulation and the day of ovulation, about two weeks before your expected period.
Free Menstrual Calendar shows these predicted fertile days in green when you set it to “fertility mode”. This is the best estimate you can get without tracking real-time fertility signals such as cervical fluid and BBT.
For more accuracy, the best way to tell when you are most fertile before ovulation is by observing your cervical fluid. It becomes wet and stretchy and like raw egg white just before ovulation. Your Basal Body temperature, which rises after ovulation, will tell you when you ovulated and tell you that your fertile time has passed. If you are ready to start more detailed tracking, you can transfer your data to Fertility Friend via your Free Menstrual Calendar App.More Questions