It is optional if you wish to continue logging your temperatures once you are pregnant/ during your pregnancy. However, the app will continue to mention your temperature in the morning as a reminder for users who wish to continue adding that data. 
If you would want to know more about temperatures experienced during pregnancy and how they may fluctuate, we encourage you to reach out to your midwife or healthcare professional to see if this is something they find beneficial for you to track.
While on NC° Follow Pregnancy, even if you choose not to track your temperature, it is good to know that you will continue to have access to dedicated pregnancy trackers, such as nausea, sensitivity to smell, forgetfulness, exhaustion, etc.
