How to check the quality of male sperm? What are the practical methods?

Sperm detection has two parts, one is naked eye detection and the other is microscope detection. The naked eye can see the color of sperm, the number of sperm and the liquefaction of semen, which is basically visible to the naked eye. Under the magnifying glass of 100 times, the main thing is to see if sperm agglutinate, and then we will observe the sperm vitality under the microscope of 200 to 400 times.