Medical Disclaimer

Belly-Bell is not a medical service. The people who built this site are developers, not doctors, midwives, or any kind of healthcare professional.

What our calculators actually do

They do math. The due date calculator applies Naegele's rule — the same formula your midwife would use as a starting estimate. The ovulation and fertile window tools use average cycle statistics. These are reasonable estimates for typical situations, but pregnancy is specific to you, your body, your history.

What this means in practice

A due date from our calculator is a starting point, not a certainty. Your actual due date will be confirmed (and possibly revised) by your healthcare provider, often using an ultrasound. The ovulation estimates assume a regular cycle — if yours isn't, the numbers will be less accurate.

Please don't use these tools to make decisions about medication, supplements, procedures, or anything that carries medical risk. That's what doctors are for.

If something seems wrong

If you're experiencing symptoms that worry you — unusual pain, bleeding, or anything that feels off — contact your doctor or midwife directly. In an emergency, call your local emergency number. Don't look it up on a pregnancy website. Call.

If you have a question about how a specific tool works, feel free to email us at hello@belly-bell.com. We can explain the math. We just can't give medical advice.