They include Standard days (calendar) method: Avoids intercourse on cycle days 8 through 12 Two-day (ovulation, or mucus) method: Based on evaluation of cervical mucus Symptothermal method: Uses a combination of basal body temperature, evaluation of cervical mucus, and abstinence during the fertile period The symptothermal method has a lower pregnancy rate with perfect use than the 2-day method or the standard days method (with or without cyclebeads).