Build your timeline

Your entries stay in this browser. Niva does not save, receive or measure them. Your browser or printer may retain a copy.

How the dates are estimated

The tool subtracts 280 days from the due date, then adds 14 and 28 completed weeks for the second and third trimester starts. These are calendar estimates, not appointments or predictions. Your care team may use a different date or convention.

Source: ACOG methods for estimating a due date.

A note from Niva

Educational wellness support, not medical advice. Your care team can help with questions about your own pregnancy.

Questions people ask

Can my due date change?

Yes. A care team may use ultrasound or other information to set or revise a due date. Use the date they give you.

Does Niva store the date?

No. The date stays in your browser; browser features may retain information.