Mathematical Basis & Formula Guide
This calculation model operates directly using continuous mathematical equations:
Reverse calculation assuming ovulation occurs 14 days before next expected menses.
Calculations are computed locally on your device with high-precision 64-bit IEEE floating-point arithmetic. No financial or personal parameters are transmitted to any remote analytics or storage server.
Frequently Asked Questions
Sperm can live up to 5 days in the female reproductive tract, creating a 6-day fertile window.