Semen analysis, also known as a sperm count test, analyzes the health and viability of a man’s sperm. Semen is the fluid containing sperm (plus other sugar and protein substances) that’s released during ejaculation. A semen analysis measures three major factors of sperm health:

• the number of sperm
• the shape of the sperm
• the movement of the sperm, also known as “sperm motility”