Supernumerary Embryos
Excess good-quality embryos remaining after fresh embryo transfer that are suitable for cryopreservation and future use.
Full Definition
Supernumerary embryos are surplus embryos of sufficient quality that remain after the optimal number of embryos have been selected for fresh transfer in an ART cycle. These embryos are typically cryopreserved for future frozen embryo transfer cycles, providing additional opportunities for pregnancy without requiring another stimulation cycle. The presence of supernumerary embryos is generally considered a positive prognostic indicator, as it suggests good ovarian response and embryo development. Decisions regarding supernumerary embryo disposition involve complex ethical, legal, and medical considerations that must be documented clearly.
Usage
Usage note: Use 'supernumerary' rather than 'leftover' or 'extra' to maintain professional terminology in clinical documentation.
In Context
- "Five supernumerary embryos were vitrified for future frozen embryo transfer cycles." — Cycle summary
- "The couple must decide on the disposition of supernumerary embryos before treatment initiation." — Consent documentation