A semen analysis evaluates certain characteristics of a male's semen and the sperm contained in the semen.Sperm count, or sperm concentration to avoid mixup, measures the concentration of sperm in a man's ejaculate, distinguished from total sperm count, which is the sperm count multiplied with volume.Anything over 20 million sperm per milliliter is considered normal.The average sperm count today is around 60 million per milliliter in the Western world, having decreased by 1-2% per year from a substantially higher number decades ago.