A semen analysis, also called a sperm count, measures the quantity and quality of semen and sperm to determine if problems with semen or sperm may be causing infertility issues in a couple unable to conceive after a year of trying. Key parameters tested include sperm volume, count, concentration, motility, morphology, pH, presence of white blood cells, and vitality. The procedure involves collecting a semen sample, diluting it, placing it on a hemocytometer under a microscope to count sperm and calculate concentration, and staining sperm to check vitality. Abnormal results in these areas could indicate issues that reduce the chances of getting pregnant.