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Fertility Glossary

Fetal pole

The earliest visible form of the developing baby on a scan.

Pregnancy after treatment

The fetal pole is the first visible thickening that represents the embryo itself, usually seen from around six weeks, shortly before or at the same time as the first heartbeat. Its size is measured to estimate gestational age.

Also known as: foetal pole

Sources

  • ESHRE guidelines and patient information

Last reviewed: 8 September 2026. Written by the Antega Editorial Team. General information only β€” always follow the advice of your own clinic, doctor or pharmacist.

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