Semen Analysis Explained: Count, Motility and Morphology
Quick answer: A semen analysis measures semen volume, sperm concentration, total count, motility, morphology and other features such as vitality and signs of infection. Labs compare results with reference values, often based on World Health Organization standards. Values below the reference range suggest reduced fertility potential, not certain infertility.
A semen analysis is a lab test that checks the health of sperm and semen. The main values are sperm count (how many), motility (how well they move) and morphology (their shape). It is the first and most important test of male fertility. Because results can vary from one sample to another, an abnormal report is usually repeated before conclusions are drawn.
This article is part of our male infertility guide.
How do you prepare?
- Avoid ejaculation for 2 to 7 days before the test, as advised by the lab
- Collect the sample by masturbation into the sterile container provided
- Avoid lubricants, saliva or regular condoms
- Collect the whole sample, as the first part contains many sperm
- Deliver it to the lab within the advised time, usually within an hour, kept at body temperature
- Tell the lab about recent fever or medicines
What do the main values mean?
Volume
The amount of semen. Low volume may point to incomplete collection, short abstinence, blockage or retrograde ejaculation.
Sperm concentration
The number of sperm in each millilitre of semen. Low concentration is called oligozoospermia.
Total sperm count
The total number of sperm in the whole sample.
Motility
The percentage of sperm that move. Progressive motility, meaning sperm that swim forward, is especially important. Low motility is called asthenozoospermia.
Morphology
The percentage of sperm with normal shape. Strict criteria are used, so even fertile men may have a low percentage of normal forms. Low morphology is called teratozoospermia.
Vitality
The percentage of live sperm, checked when motility is very low.
pH and liquefaction
Semen should liquefy within a set time and have a normal pH. Abnormal values may suggest infection or blockage.
White blood cells
Raised white cells may point to infection or inflammation.
What if there are no sperm?
This is called azoospermia. It may be due to blockage or a production problem. Further tests, including hormone levels, scans and genetic tests, help find the cause. In some cases, sperm can be retrieved surgically for IVF with ICSI.
Why repeat the test?
Sperm numbers naturally vary between samples. Fever, illness, stress and short or long abstinence can change results. If the first report is abnormal, doctors usually repeat it after a few weeks.
Key Takeaways
- Semen analysis checks count, motility and morphology.
- Prepare with the advised abstinence period.
- Results are compared with reference values.
- Abnormal results should be repeated.
- Results guide whether IUI, IVF or ICSI may be suitable.
Final Thoughts
A semen analysis gives couples quick, useful answers early in their fertility evaluation. Understanding the report makes the next steps clearer and less stressful. For help interpreting your results, you can consult Dr. Swati Shree, a fertility specialist at Eve Women & Fertility Clinic in Bengaluru.
FAQs
What is a normal sperm count?
Labs use reference values, often based on World Health Organization standards, to decide what is within the expected range. Your report will show these values. A count slightly below the range does not always mean infertility.
Can I collect a semen sample at home?
Some labs allow home collection if the sample reaches them within the advised time and is kept at body temperature. Others prefer collection on site. Ask the lab for clear instructions before you start. Often yes, if the lab allows it and the sample reaches them within about an hour kept at body temperature. Many clinics prefer on-site collection so conditions and timing are controlled.
What does low motility mean?
Low motility means fewer sperm are moving forward well. This can make it harder for sperm to reach the egg. Treatment depends on the cause and severity, and may include IUI or IVF with ICSI.
Is low morphology a serious problem?
Morphology is judged by strict criteria, so many fertile men have a low percentage of normal forms. On its own, it may have limited impact. Doctors look at all values together. Not always. Strict scoring makes even normal samples show low normal-shape percentages, and many men with low morphology still father children. It matters most read with count and motility.
How long does a semen analysis take?
The test is usually completed on the same day, and results are often available within a day or two. Some advanced tests, such as DNA fragmentation, may take longer. The appointment itself is short, and results usually come within a few days. Two to seven days of abstinence before the test gives a sample that reflects your usual production.
What should I do if my semen analysis is abnormal?
Do not panic. Ask your doctor to repeat the test after a few weeks. If it is still abnormal, further tests may be advised. Many problems can be treated or worked around with assisted reproduction. Repeat it after several weeks, since single results fluctuate with illness, fever and abstinence. A persistently abnormal result leads to a physical exam, hormone tests or a urology review.