Contact Us
Report a calendar mismatch, unclear explanation, accessibility problem, or technical issue.
Send a specific report.
For a calculation correction, include the birth date, conception-input method and date, the result shown, and the result you expected. For a content correction, include the page URL and a reliable source.
Please do not send medical records.
The contact address is for website feedback, not medical advice. Do not send ultrasound images, test results, or other sensitive health records. We cannot answer personal pregnancy questions or interpret medical tests.
What to expect.
Messages are read for corrections and site-support purposes. Sending an email shares its contents and email metadata with the email provider; this differs from the on-page calculators, which process dates locally. See the privacy policy for details.