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Fertility Glossary

Endometrial thickness

How thick the uterine lining measures on ultrasound.

Frozen embryo transfer

Clinics check lining thickness before transfer. Very thin linings are associated with lower pregnancy chances, but there is no single cut-off that guarantees or rules out success.

Also known as: lining thickness

Related United Kingdom guides

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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