Embryo Cryopreservation
The process of freezing and storing embryos for future use in fertility treatments.
Full Definition
Embryo cryopreservation involves freezing embryos at ultra-low temperatures, typically using liquid nitrogen at -196°C, to preserve them for future transfer cycles. The process uses cryoprotectants to prevent ice crystal formation that could damage cellular structures. Modern techniques primarily employ vitrification, a rapid freezing method that achieves better survival rates than traditional slow-freezing protocols. Cryopreserved embryos can be stored for many years and used in frozen embryo transfer cycles, providing flexibility in treatment timing and reducing the need for repeated ovarian stimulation.
Usage
Usage note: Specify the freezing method (vitrification vs slow-freeze) when technically relevant.
In Context
- "The remaining high-quality embryos underwent cryopreservation using vitrification protocols." — laboratory report
- "Embryo cryopreservation allows for deferred transfer and family planning flexibility." — patient counseling notes