Female Health: Determining Your
Coverline
Taken from the pages of
Taking Charge of Your Fertility
How to determine your temperature coverline:
- Take your temperature with the same thermometer at the same time everyday
- before you get out of bed.
- Identify the first day your temperature rises at least 2/10 of degree higher
than it had been the previous 6 days.
- Highlight the last 6 temps before the rise.
- Locate the highest of those six highlighted temps.
- Draw the coverline 1/10 of degree above the highest of that cluster of six
days preceding the rise.
- High temps during your period are irrelevant.
- Once you see a third high temperature above the coverline (the 3/10 higher
than 6 preceding days) you know you have ovulated.
NOTE: Most NFP books will tell you that when you see above coverline temps for
18 days you are pregnant.
For spring daylight savings time,
- If you normally take your temperature at 8:00 AM
- On Saturday of daylight savings weekend, take your temperature at 7:40 AM
- Set your clock ahead that evening
- Take your temp on Sunday at 8:20AM
- Start taking your temps at the normal time 8:00 AM on Monday
