Fertility Education & Training

guidelines to charting your fertility cycle, page 16 of 26

2. The Mucus Symptom - Infertility Post Ovulation by Double Check or Mucus Rules

After PEAK DAY, count 3 days of DRYNESS (brown block) and / or a change back to white, sticky mucus (yellow block).
If you double-check it with 3 high readings: you are infertile from 3^rd night after PEAK and 3^rd high reading, whichever comes later (i.e. Day 17 in this chart if both signs coincide).
If you use mucus only, with no double-check: you wait till 4^th day after PEAK before you are infertile (i.e. Day 18 in this chart).

amount of mucus

(Marked red on this chart to avoid confusion with Peak 1, 2, 3 in the line above)

Mucus secretion normally increases up to ovulation and then decreases after it. It is a useful sign to chart and so, below the Peak Day line, there is a row to mark the amount of mucus you thought you had. It’s not a precise measurement, just 1 = scant, 2 & 3 = increasing, 4 or 5 mean lots of mucus. You may not be able to assess it for your first chart, but by the 2^nd and 3^rd chart you should have a rough idea of what is scant and what is more abundant for your mucus pattern. In some cycles, you may not write more than 2 or 3, showing the mucus was less that cycle. It does happen!

Chart showing the amount of mucus for each day of the cycle. On this example chart the readings begin with a level of 1 on day 10, increase to 2 on day 11, 4 on day 12, 5 on day 13. The level drops slightly to 4 on day 14 and then back to 1 on day 15.