What is a coverline?

The coverline is a horizontal line drawn after ovulation to help differentiate temperatures before ovulation (low) and temperatures after ovulation (high). Your coverline is drawn after you have clearly established ovulation.

Find out when you will ovulate with the babyMed ovulation calculator!

When your waking body temperature rises more than 0.2 or two-tenths of a degree higher than the previous six days, and it stays that way for at least two days, your coverline can be established. This rise normally occurs during your thermal shift the day after ovulation.

For example, a jump from 97.1 to 97.3 is a rise that is two-tenths of a degree higher.

Now it's time to learn how to create your own fertility chart!