Born in March: When Were You Conceived?

Birthdays & conception. Updated October 11, 2026. Calculated with the standard pregnancy dating method used by ACOG and the NHS.

People born in March were most likely conceived between June 8 and July 8 of the year before, assuming they were born close to their due date.

That means most March babies were conceived in the summer (northern hemisphere). Babies born early were conceived a little later than this, and babies born late a little earlier.

For a specific birthday, use the conception calculator by birth date.

This article is general information, not medical advice. Talk to a doctor or midwife about your own pregnancy or fertility.