TwoDay Method

The TwoDay Method asks a woman two questions each day: did I notice secretions today, and did I notice them yesterday? If either answer is yes, the day counts as fertile.

In a trial of 450 women in three countries, the first-year pregnancy rate was 3.5 per 100 women when couples avoided intercourse on flagged days, and 13.7 per 100 women when every cycle and pregnancy was counted.¹ After the first cycle, 96.4 percent said they had no trouble telling whether secretions were present.¹

The method is simple by design. One yes-or-no answer does not describe the mucus cycle in the detail a clinician reads when looking for a cause.