Genetics
An embryo biopsy usually takes around five cells from the trophectoderm of a day 5 or 6 blastocyst using a laser and fine pipette. The embryo is then vitrified while the sample is analysed. The procedure requires an experienced laboratory; a small risk of damage exists, and results can occasionally be inconclusive, requiring a repeat biopsy.
Also known as: trophectoderm biopsy, biopsy of embryo
Related South Africa guides
Sources
- ESHRE/ICMART glossary and ESHRE laboratory guidance
Last reviewed: 8 September 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.