Your Cycle
Hormonal changes during a woman’s menstrual cycle cause slight fluctuations in her basal body temperature. A slight increase in temperature signals that ovulation has taken place.

On average, a woman can become pregnant on 6 days per 28-day cycle: 5 days before ovulation and on the day of ovulation.

Each cycle includes only one ovulation. In rare cases that more than one ovulation occurs, they occur within 24 hours.

After ovulation, the egg is fertilizable for a maximum of 18 hours.

Sperm can remain mobile and capable of fertilizing an egg in a woman’s body for up to 120 hours after sexual intercourse.

Of course, every woman is different, and your cycle may be longer or shorter than 28 days. Lady-Comp’s calculations take all this into account.

How Lady-Comp Works
Using your daily temperature readings, Lady-Comp recognizes your personal cycle and analyzes it against your own cycle history plus data on over 700,000 cycles. If you’ve got a fever or skip temperature readings, Lady-Comp can adjust for that as well. The result is an extremely reliable reading every day: clinical studies have determined that Lady-Comp identifies a woman’s fertile period with 99.3% accuracy.