The most common reasons for laboratory semen analysis in humans are as part of a couple's infertility investigation. It is also commonly used for testing human donors for sperm donation.
Semen analysis is the single most important test of male fertility
What are we looking for?
Sperm count
Ability of sperm to swim (motility)
Velocity or forward progression of the sperm
Size and shape of the sperm (morphology)
Total semen volume
The liquefaction of the semen (the ability to go from normal gel-like state at ejaculation to a liquid state)