IVF & IUI
The semen sample is separated so that motile sperm are concentrated in a small volume of culture medium, removing seminal fluid, debris and non-motile cells. This is required before IUI and is also used in IVF and ICSI.
Also known as: sperm preparation, density gradient, swim-up
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.