- strong>Density gradients: several layers of different concentrations are added to separate the different cellular fractions of the semen. After centrifugation of the sample, the motile sperm are at the bottom of the tube.
- strong>Swim-up: sperm retrieved from density gradients are added to a tube with semen preparation medium and incubated under controlled conditions. The sperm with the best mobility will be found in the upper part of the sample, from where they will be recovered for use in the treatment of assisted reproduction.
Sperm washing process
By Aitziber Domingo Bilbao BSc, MSc (embryologist), Cristina Mestre Ferrer BSc, MSc (embryologist), Dr. Marita Espejo Catena BSc, MSC, PhD (gynecologist), Rebeca Reus BSc, MSc (embryologist) and Romina Packan (invitra staff).
Last Update: 10/01/2019