You can also use Natural Cycles to plan a pregnancy. After ovulation, your temperature rises due to the release of the hormone progesterone. If conception occurred, progesterone continues to produce to help with the development of the fetus. You will see your temperature remain elevated after your expected period. Natural Cycles recognizes that conception has possibly occurred and will prompt you to take a pregnancy test for confirmation. Once you indicate a positive pregnancy test, your temperatures after ovulation will change to blue.
Example of a chart showing when you have entered a positive pregnancy test:
Once you enter a positive pregnancy test, Natural Cycles will go into the "Follow a Pregnancy" mode in the app. In this mode, instead of the daily fertility status, you will see what pregnancy week you are in, a countdown to how many days you have left in your pregnancy, conception, and due date.
Below you can see a "Follow a Pregnancy" mode screen: