To turn it off, go to More --> Settings --> Fertile Window.
Having the fertile window turned off may be helpful if:
- You don't want to see it.
- You don't ovulate.
- You take a form of hormonal birth control that suppresses ovulation.
- Your periods haven't started yet (perimenarche).
- Your periods have ended (perimenopause).
- Your cycles are too irregular to make predictions helpful (PCOS, endometriosis, IUD).