Genetics
A biopsy takes around five cells from the trophectoderm, the layer that becomes the placenta, usually on day five or six. The embryo is then vitrified while results are processed. It requires an experienced laboratory, and there is a small risk of damage or of an inconclusive result requiring re-biopsy.
Also known as: embryo biopsy
Sources
- Royal Australian and New Zealand College of Obstetricians and Gynaecologists (ranzcog.edu.au)
- Royal College of Pathologists of Australasia (rcpa.edu.au)
Last reviewed: 10 September 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.