Eggs, sperm & embryos
A metaphase II egg has extruded its first polar body and is ready to be fertilised. Immature eggs (GV or MI) usually cannot be used, which is why the number of eggs collected is often higher than the number injected in ICSI.
Also known as: MII, metaphase II, mature egg
Related Canada guides
Sources
- Canadian Fertility and Andrology Society (CFAS)
Last reviewed: September 9, 2026. Written by the Antega Editorial Team. General information only — always follow the advice of your own clinic, doctor or pharmacist.