Fertility awareness methods (FAM) are NOT the rhythm/calendar method!
The symptothermal double-check method of FAM uses science and data for 99.6% effective birth control when used correctly.
By tracking my basal body temperature and paying attention to cervical fluid, you can figure out whether you could be fertile or not every day.
You're only able to get pregnant a few days per cycle, so you can have unprotected sex on days that you know there is 0% chance of pregnancy.
Hormonal birth control shuts down your reproductive system. FAM has no side effects and let's you keep your fertility in your own hands.