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No contact form and no account. Write about a formula bug, a confusing page, or a privacy question — we read every message.
Last updated: July 17, 2026
Good reasons to write
- Wrong IVF day-age offset, LMP/EDD math, or gestational-age display
- Copy that overpromises accuracy or buries the estimate disclaimer
- Broken link, layout issue, or accessibility problem
- Privacy question about analytics, ads, or localStorage remember
Estimate only — not medical advice. Ultrasound and clinic dating policy override any browser estimate. Confirm medical decisions with your clinician.