Editorial and Sourcing Policy

Last Updated:

At Period Calculator (this website), we are committed to delivering health and menstrual calculation content that is medically accurate, evidence-based, transparent, and easy to understand.

1. Authoritative Sourcing Standards

Every calculation formula, biological description, and clinical threshold published on our website is strictly derived from high-authority, peer-reviewed medical and governmental sources:

  • Professional Medical Societies: American College of Obstetricians and Gynecologists (ACOG), International Federation of Gynecology and Obstetrics (FIGO), American Society for Reproductive Medicine (ASRM), Endocrine Society.
  • Public Health Agencies: National Institutes of Health (NIH), Centers for Disease Control and Prevention (CDC), National Health Service (NHS UK), World Health Organization (WHO), Mayo Clinic.
  • Peer-Reviewed Journals: The New England Journal of Medicine (NEJM), The Lancet, Fertility and Sterility, Human Reproduction, American Journal of Obstetrics and Gynecology.

We do not cite non-academic blogs, unverified commercial health portals, or sponsored marketing articles. Every substantive claim includes clear references and direct links.

2. Content Creation and Review Process

  1. Research & Drafting: Articles and tool specifications are authored by experienced technical and health writers following current clinical guidelines.
  2. Formula Verification: Mathematical algorithms are unit-tested against clinical benchmark datasets to ensure zero off-by-one errors across leap years, DST changes, and boundary conditions.
  3. Medical Disclaimer Enforcement: Every calculator page and health article prominently carries a medical disclaimer and a “When to See a Doctor” guidance block.
  4. Clinical Supervision & Medical Review: Content undergoes structured review against established obstetrical and gynecological clinical literature and guidelines.

3. Regular Review and Update Cadence

Medical science evolves. We conduct systematic editorial reviews of our calculation algorithms and educational guides at least once every 12 months, or immediately following new guideline releases from major gynecological bodies (such as updated ACOG practice bulletins).

The visible Last Updated date on each page reflects the most recent editorial verification.

4. Corrections and Feedback

We value accuracy above all else. If you identify a potential discrepancy in our formulas, a broken reference link, or an outdated clinical statistic, please contact our editorial desk at: infosemakanstr@gmail.com

Legitimate corrections are investigated and updated promptly within 48 business hours.