A semen sample surely consists of a mixture of functional and nonfunctional spermatozoa. To fertilize an egg, it is important to select functional sperm cells and to obtain a good fertilization rate. For this, the sperm needs to be processed. We do this here at our center. The motive is to have high quality sperm samples so that good quality embryos can be achieved. We process the sperm samples so that the highest quality of the spermatozoa can be obtained and further used for fertilization.