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Fertility Glossary

Cumulative live birth rate

The chance of a live birth from all embryos from one egg collection, fresh and frozen.

Pregnancy after fertility treatment

Cumulative rates give a fuller picture than a single transfer, because they include frozen embryos used later. They are reported over a set period.

Also known as: CLBR, cumulative success rate

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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