In order to use a semen sample in assisted reproductive techniques, the sample must be processed in the laboratory. This processing, known as sperm capacitation, consists of removing the seminal fluid and keeping only the spermatozoa with the best motility. Therefore, it performs a sperm selection based on the motility of the spermatozoa.
There are several methods for capacitation of the semen sample: density gradients and swim-up. The spermatozoa with the best motility obtained by these techniques will be used in assisted reproduction techniques.
However, there are currently other methods for sperm selection, such as the MACS technique. This technique makes it possible to separate healthy spermatozoa from apoptotic spermatozoa using magnetic fields.