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Fertility Glossary

Live birth rate

The proportion of cycles or transfers that result in a live birth.

Fertility basics

A live birth rate is only meaningful with its denominator. The same clinic can quote a rate per initiated cycle, per egg collection, per embryo transfer or per patient, and the numbers will differ substantially. Rates also depend heavily on patient age and on whether donor eggs were used. Australian clinics report to ANZARD, and age-specific national figures give a fairer basis for comparison than a headline percentage in an advertisement.

Also known as: success rate, birth rate, LBR

Sources

  • Australian and New Zealand Assisted Reproduction Database, National Perinatal Epidemiology and Statistics Unit, UNSW Sydney (npesu.unsw.edu.au)

Last reviewed: 10 September 2026. Written by the Antega Editorial Team. General information only โ€” always follow the advice of your own clinic, doctor or pharmacist.

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