Contact Child Growth Lab

Child Growth Lab uses one public support email: support@childgrowthlab.com. Messages are handled through the site-maintenance process. The individual developer decides whether a report requires a source, content, code, test, accessibility, or privacy correction.

The address is for reports about this website. It does not interpret an individual child's result or provide a personal diagnosis, prescription, feeding plan, test, or referral decision.

• A calculation result, threshold, or boundary that appears incorrect.
• A unit-conversion, date-handling, or rounding problem.
• A question about a formula, dataset, source, or version.
• An inaccurate citation, broken link, or potentially outdated statement.
• A mismatch between a page explanation and the calculation it displays.
• An accessibility barrier.
• A responsive-layout, browser, or device problem.
• A privacy-statement concern or unexpected data transmission.
• A security concern or another technical issue.

The inbox is not used for medical consultations, personal result interpretation, prescriptions, feeding instructions, or decisions about testing and referral.

A useful calculation report includes:

• The page URL and calculator name.
• The selected Metric or US-unit mode.
• The browser, device, and operating system when relevant.
• The displayed result and the result you expected.
• An official source or independent recomputation supporting the expectation.
• Minimal, repeatable steps that reproduce the behavior safely.

Prefer fictional, synthetic, or de-identified inputs. A date issue can use example dates unrelated to an actual child. Remove names, account details, precise birth information, and other identifiers from screenshots. Do not attach complete medical records. Real child data is not required to investigate a reproducible software issue.

A useful content or evidence report identifies:

• The page URL and section heading.
• The specific sentence that may be inaccurate, outdated, or easy to misunderstand.
• Why the wording or source may need review.
• The official source title and direct link.
• The guideline, dataset, or paper version and publication date when available.
• Whether the issue concerns a broken link, source update, translation, or wording boundary.

A commercial calculator, blog, or search summary can be a lead, but it cannot by itself override an official or original source. A difference does not always mean this site is wrong: age range, chart, source version, measurement method, or clinical purpose may differ.

Include the page URL, browser and operating system, assistive technology when used, screen size or device, repeatable steps, expected behavior, and actual behavior.

Do not send passwords, API keys, session tokens, or malicious files. Do not attempt to access, alter, disrupt, or damage systems or data that do not belong to you. Report the issue with a safe, minimal description. Child Growth Lab does not claim to operate a formal vulnerability-reward program or a dedicated security team.

A site-related report may proceed through these steps:

1. Check whether the reported behavior can be reproduced.
2. Compare the original source, current implementation, and public wording.
3. Determine which calculations, pages, sources, tests, or users may be affected.
4. Add or update a regression test when practical.
5. Correct the affected code, content, source record, privacy wording, or accessibility implementation.
6. Run the full release-validation process again.
7. Update the affected page's review date after substantive re-review.
8. Verify the released correction on the Production domain.

Not every report results in a change. A report that cannot be reproduced or lacks sufficient evidence may remain under investigation. No fixed response time is promised, and the inbox does not provide individualized medical judgment. See Editorial Review for the wider evidence, testing, and correction process.