Cumulative Live Birth Rate
Also written as: CLBR — Cumulative Live Birth Rate
Statistical measure of live births achieved per patient over multiple treatment cycles. Used to assess long-term treatment success.
Full Definition
A comprehensive outcome measure in reproductive medicine that calculates the probability of achieving a live birth per patient over multiple treatment cycles, including all fresh and frozen embryo transfers from a single ovarian stimulation cycle. This metric provides a more realistic assessment of treatment success than per-cycle rates, as it accounts for the cumulative potential of all embryos generated. Cumulative live birth rates are typically reported over 1-3 years and may include natural conceptions occurring between treatments. This measure is increasingly used in patient counseling and clinic reporting as it better reflects real-world treatment outcomes and helps set appropriate patient expectations.
Usage
Usage note: Preferred over per-cycle rates for patient counseling as it provides more realistic expectations.
In Context
- "The clinic reported a cumulative live birth rate of 65% for patients under 35 undergoing their first IVF cycle." — Outcome statistics
- "Cumulative live birth rates including all frozen embryo transfers provide a more complete picture of treatment success." — Research paper