Editorial Policy
Last updated: April 15, 2026
Reviewed by our medical advisory team
Our editorial policy ensures that all health information provided on Period Calculator is accurate, up-to-date, and based on credible scientific sources. We are committed to transparency in our content creation process.
Medical Sources
We reference only authoritative medical organizations and peer-reviewed research to ensure our content meets the highest standards of accuracy:
- American College of Obstetricians and Gynecologists (ACOG) - Practice Bulletins
American College of Obstetricians and Gynecologists - the leading authority on women's health
- World Health Organization (WHO) - Reproductive Health Guidelines
World Health Organization - global health authority
- National Health Service (NHS) UK - Menstrual Health Information
UK National Health Service - evidence-based health guidance
- Mayo Clinic - Women's Health Resources
Mayo Clinic - trusted medical research and education
Content Review Process
Every piece of content goes through a rigorous review process to ensure accuracy and relevance:
- Initial research by qualified health writers
- Review by medical professionals
- Regular updates based on latest research
- User feedback incorporation
Update Frequency
We maintain our content to reflect the latest medical guidelines and research:
- Core content reviewed quarterly
- Medical guidelines updated as new research emerges
- Fact-checking performed on all references
- Broken links checked monthly
Accuracy Commitment
We strive for precision in all our health information while acknowledging the limitations of predictive tools:
- Algorithms based on established medical research
- Clear disclaimers about prediction accuracy
- Correction policy for reported errors
- Transparency about data sources
Disclaimer
Important information about the limitations of our service:
- This is a prediction tool, not a medical device
- Results are estimates based on averages
- Consult healthcare professionals for medical advice
- We are not responsible for decisions made based on predictions