Contact
For questions, bug reports, or feature suggestions, please contact us at the email below.
Email
[email protected] Frequently asked questions
- The result differs from what my obstetrician told me
- Our calculator uses the first day of your last menstrual period (LMP) + 280 days (Naegele's rule). Obstetricians use ultrasound measurements in addition for a more accurate estimate. Trust your doctor's date when they differ.
- My cycle is not 28 days
- Version 1 assumes a 28-day cycle. Custom cycle-length input will be supported in a future update.
- Where is my entered data stored?
- Everything you enter is processed only inside your browser and is never transmitted or stored on any server. For details, see our Privacy Policy.