Fertility Education & Training

guidelines to charting your fertility cycle, page 15 of 26

2. The Mucus Symptom - Why Is PEAK DAY Important?

PEAK DAY is the closest marker of ovulation. In most women, ovulation occurs either on, just before or just after PEAK DAY and that is why it is considered the most fertile day of the cycle. It is also important for the method rules. So it must always be marked on the chart by circling the last day in the green block as shown in the chart below (Day 14 in this example).

after peak day, the symptoms rise back up the chart, giving several possible patterns:

Complete mucus chart showing all the days of the cycle.