Calculation method
Each cycle is the average of both partners' values. The combined curve is also an average.
Hoffmann Software & Servicewww.hoffmann-software.de
Biorhythm & Family Planning â Couples
Comparison of both partners' biorhythms based on the original program.
FREE · NO SIGN-UP · ONLINE
Biorhythm & Family Planning â Couples
Comparison of both partners' biorhythms based on the original program.
Choose an analysis
01 / INPUTS
Date range and personal details
Info
Remember my details for next time
If you choose, your birth dates and cycle details will appear automatically on future visits. The chart will start from today each time.
I explicitly agree to save my birth dates and cycle information in a browser cookie on this device for 180 days.
Birth dates and menstrual data are private. The cookie is set only with your agreement, sent only to this calculator, and can be erased at any time. No profile database.
02 / RESULTS
Chart results
Couples (Man: 01.01.1990 · Woman: 01.01.1992)
03 / INFORMATION
Background and notes
Scientific notice
Traditional biorhythm theory is not scientifically validated. Sex prediction has no proven predictive power. Calendar-based ovulation estimates are unreliable and must not be used for contraception or medical planning.
Comparing two biorhythm profiles
Each personâs four biorhythm values are calculated independently and the corresponding daily values are averaged for a shared chart.
The result cannot scientifically measure compatibility or the quality of a relationship. It is an experimental display.