Editorial & Medical Review Policy

Last updated: October 23, 2026

Sourcing standard

Every medical statement on ExpectCalc traces to a primary source: ACOG committee opinions and practice bulletins, Institute of Medicine / National Academy of Medicine reports, WHO recommendations, or the original peer-reviewed study. Each page lists its sources explicitly, and calculators encode published conventions rather than invented rules. Secondary reporting, forums, and AI-generated summaries are never used as sources for medical claims.

Writing and review process

Content is drafted from the primary sources, then checked line-by-line against them before publication. Calculators are tested against worked examples and edge cases (see the project's public test suite). Medical pages follow a standing rule: state the population evidence, state the individual caveat, and never convert a statistical range into a personal prediction.

Review is ongoing rather than one-time: when a cited guideline is updated or a reader reports an error, the affected page is re-checked and corrected, and the update is noted in the page's revision date.

Corrections

Found an error — a wrong number, a stale guideline, a broken interpretation? Email support@expectcalc.com with the page and the claim. Valid corrections are made promptly and acknowledged. Disagreements about clinical judgment are resolved in favor of the cited primary source, or the passage is rewritten to present the range of guidance.

What this site is not

ExpectCalc is not a medical provider, does not offer telehealth, and does not respond to individual medical questions — including emails asking for interpretation of personal results. Those messages receive a standard reply directing the writer to their care team. The site's scope is deliberately narrow: date arithmetic and published ranges, clearly sourced, honestly hedged.