- You can keep a menstrual calender and chart your periods and follow changes in cervical mucus, and have timed intercourse by subtracting 14 from your longest and shortest cycles.
- You can use ovulation prediction tests (you may need more than one set of tests if your cycles are very irregular).
- You can ask your doctor if you are a candidate for a medication called Clomid, which will force you to ovulate at a more specified time (use in conjunction with ovulation prediction tests).
- Enhanced Fertility at MyMonthlyCycles - chart your fertility cycles.
- WhenMyBaby.com Conception Calculator - uses your shortest and longest cycles.
- WhenMyBaby.com Ovulation Predictor Kit Test Days Calculator