Most importantly, according to the American Urological Association (AUA)/American Society of Reproductive Medicine (ASRM) Guidelines, entitled: Diagnosis & Treatment of Infertility in Men: ASU/ASRM Guidelines, a male who has an initial SA that is abnormal, should always have a second SA to confirm the abnormal parameters.
I see many SAs where all parameters are perfectly normal, with only low motility/high immotile percent. Even when the SA demonstrates excellent sperm concentration, motility is an independent and important determinant of fertility potential. A few excellent publications can be viewed hereand here.
Most notable, men who have a "triple defect" of low sperm concentrations, low percentage of normal morphology, and low percentage of motile sperm have the highest probability of infertility.
Volume of Ejaculate:
- Average volume of ejaculate is approximately 2 to 5 mls.
- Absence of ejaculate or very low volume may indicate a congenital defect where the ducts that transport sperm from testes to the penis are closed or mostly closed.
- Low volume may also indicate ejaculatory dysfunction (inability to ejaculate), frequent ejaculations in which volume is depleted.
Sperm Concentration:
- At a minimum, concentration of sperm is considered to be 15 million sperm per 1 ml of ejaculate.
- Oligospermia is the diagnosis given with sperm count < 15million/ml.
- Azoospermia is the diagnosis given if sperm are completely absent.
- Sperm count can have a wide variability from week to week in a single male, so for this reason, if the sperm concentration is low, the man will be asked to repeat the analysis in 2-3 weeks.
- A concentration of 5 million sperm per 1 ml of ejaculate is considered severely low, and a repeat analysis may not likely indicate a normal sperm count.
Sperm Morphology (Shape or Form):
- At least 4% of the sperm should be of normal morphology.
- As noted in the image above, there are many different types of abnormal morphology of sperm.
- Each sperm cell should have a head which contains the genetic material and a single tail that permits motility (movement of sperm).
- There are many types of abnormal morphology, including but not limited to: large or misshapen heads, sperm with multiple heads, tails bent at > 90º, sperm with multiple tails, coiled tails and/or shortened or elongated tails.
Sperm Motility (Movement):
- Motility can be further divided into total motility = progressive (good forward movement) + non-progressive (poor forward movement).
- Progressive motility: sperm swims in straight lines and large circles.
- Non-Progressive motility: sperm swims in straight lines and tight circles.
- Healthy sperm should have a majority of sperm with progressive (fast) motility.
- Obviously, a high percentage of completely immotile sperm will negatively impact fertility for couples.