Editorial principles
What FemiFitCalc publishes, where the numbers come from, what this site refuses to claim, and how to tell us when something is wrong.
The math is shown, not hidden
Every calculator displays the exact formula it uses and a worked example with real numbers, so any result can be checked by hand. The interpretation tables, the cutoffs and the sources are on the page itself — nothing about the method is hidden.
Where the numbers come from
Each calculator page carries a Sources section pointing to the organisation or publication behind the method — the World Health Organization, the US CDC, the NIH, EFSA, ACOG, the NHS and others. Our standard is primary or official sources: the guidance, the paper or the institution that actually defines the method. A few pages still cite secondary references that fall short of that standard; replacing them is planned work, with no promised date.
Screeners flag topics, they do not diagnose
The three screeners — PCOS symptom screener, perimenopause symptom screener and bone density risk screener — count how many common symptom or risk patterns you recognise in yourself. Each one states on its page that it is not a diagnosis: PCOS can only be confirmed with bloodwork and/or an ultrasound, perimenopause has no single confirming test, and bone density can only be measured by a scan such as DEXA. The screeners produce a count and a conversation topic for a doctor — never a percentage likelihood, a clinical score or a verdict.
The postpartum timeline is recovery-only
The postpartum recovery timeline deliberately contains no weight-loss, calorie or "get your body back" content. It shows general physical recovery milestones after childbirth and pushes back against "snap back" pressure — slow, gradual healing is the normal, healthy path. The milestones are general ranges, not a schedule anyone must meet.
The BBT log is not contraception
The BBT & fertility awareness log is for observing cycle patterns only. Its own page states that it is not a taught fertility awareness method and must not be used or relied on as a standalone contraception method — it cannot tell you when you are fertile and does not identify safe days. For contraception or conception decisions, use a properly instructed method and consult a qualified healthcare provider.
FRAX is not replicated
The bone density risk screener is a count of well-established risk factors from the classic NOF/BHOF list. It deliberately produces no percentage risk and no T-score: FRAX, the WHO's fracture risk assessment algorithm, is a licensed clinical tool and is not copied, approximated or re-implemented here. A DEXA scan and a clinician remain the way to measure bone density and fracture risk.
No advertising, no tracking to sell you things
FemiFitCalc is an independent project. There is no advertising on the site, no affiliate links and no paid tier. The only analytics is Cloudflare Web Analytics, which is cookieless and reports aggregate usage — it does not identify individual visitors or build advertising profiles. The privacy policy describes exactly what that means in practice.
How to report a mistake
Found a formula that does not match its source, a worked example that does not add up, or wording that overstates what a tool can do? Email [email protected] or use the contact form, which reaches the same inbox. Corrections are applied to the page, and its visible "Last updated" date moves with the change.
How often content is reviewed
Every calculator page shows a visible "Last updated" date, and that date reflects real content changes — it is not one stamp applied to every page at once. No fixed review schedule exists: content is updated when it changes, not on a calendar. When a schedule is ever introduced, this page will say so. Until then, the "Last updated" date on each page is the honest signal of how current the content is.
More about how the site works
The About page describes who runs FemiFitCalc and how the formulas are chosen; the terms of use cover the limits of informational estimates.