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Fertility Glossary

Pregnancy of unknown location (PUL)

A positive test where the pregnancy cannot yet be seen on scan.

Pregnancy after fertility treatment

A PUL is monitored with repeat hCG blood tests and scans until the location is clear. It may be a very early pregnancy, a pregnancy that is ending, or an ectopic pregnancy. Seek urgent help for severe pain, shoulder-tip pain, fainting or heavy bleeding.

Also known as: PUL

Last reviewed: 23 September 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.

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