What is the difference between STM and the Rhythm Method?
The STM is based on the daily observation of your fertility signs, whereas with the Rhythm method (also known as Knaus/Ogino method, called after two medical doctors of the twenties and thirties of the last century), you calculate the past fertile calendar days and project them into the current, not yet finished cycle. The rhythm method is therefore very unreliable, even for women with such slight cycle variations that are still considered as regular. It is also very often confused with the temperature method which was developed in the fifties of the last century by Döring, Marshall, Vollmer and others.
