What is Semen Analysis?
💡 Semen analysis = comprehensive sperm test. WHO 2021 lower reference limits: volume ≥1.4mL, concentration ≥16M/mL, total motility ≥42%, progressive motility ≥30%, morphology ≥4% normal, vitality ≥54%. Below these = abnormal. Single test is insufficient — always repeat if abnormal (3-month interval minimum). Guides IUI vs ICSI/IVF decision.
Semen analysis (seminogram / sperm test) is the fundamental investigation of male fertility. It measures the volume, concentration, motility, morphology, and vitality of sperm in a freshly produced ejaculate sample. Semen analysis is the first-line test for all male partners in a fertility workup and provides the primary data needed to assess male factor contribution and select the appropriate treatment pathway.
🇮🇳 India Context: Semen Analysis is widely assessed and treated across major Indian fertility centres including Chennai, Mumbai, Bangalore, Delhi, and Hyderabad.
What are the key characteristics of Semen Analysis?
- WHO 2021 lower reference limits (5th percentile): volume ≥1.4mL; concentration ≥16M/mL; total sperm number ≥39M/ejaculate; total motility ≥42%; progressive motility ≥30%; morphology (Kruger strict) ≥4%; vitality ≥54%
- Total Motile Sperm Count (TMC) = concentration × volume × progressive motility%: the single most clinically useful number; TMC >20M = IUI viable; TMC 5–20M = borderline; TMC <5M = ICSI/IVF
- Abnormal result terminology: oligozoospermia (low count); asthenozoospermia (low motility); teratozoospermia (abnormal morphology); OAT syndrome (all three); azoospermia (no sperm)
- Kruger strict morphology: only sperm with perfect head, midpiece, and tail form scored as normal; <4% normal = teratozoospermia; associated with lower IVF fertilisation rates (conventional IVF) — ICSI recommended
- Repeat testing rule: one abnormal result is insufficient — must repeat after minimum 74 days (one spermatogenesis cycle) as illness, fever, and stress cause temporary decline
- DNA fragmentation: NOT measured in standard semen analysis; must be specifically requested (SCSA/DFI test); can be elevated with normal count/motility/morphology
- Sample collection: 2–7 days abstinence; masturbation into sterile container; analysed within 1 hour; temperature maintained 20–37°C during transport
- Advanced tests: anti-sperm antibodies (ASA), reactive oxygen species (ROS), hypo-osmotic swelling (HOS) test for vitality, SCSA for DNA fragmentation
How does Semen Analysis work?
Why does Semen Analysis matter in fertility?
Semen analysis is the most important male fertility test and is frequently underordered or under-repeated. The most common clinical error: a single borderline result triggers immediate IVF recommendation without a repeat test — at least one repeat is mandatory as temporary illness or suboptimal collection conditions can cause a 50% decline in all parameters. A man with a TMC of 8M post-wash on repeat testing does not need IVF — he needs IUI. Conversely, a TMC <1M on two tests = severe male factor; ICSI with or without surgical sperm retrieval is the pathway, and DNA fragmentation testing should be added.
What are related terms to Semen Analysis?
Low Sperm Count (Oligospermia)
Low Sperm Count (Oligospermia) means fewer than 15 million sperm per millilitre …
Varicocele
Varicocele is an enlargement of the veins within the scrotum — similar to varico…
Azoospermia
Azoospermia means there is no sperm in the ejaculate. It affects about 1% of all…
ICSI (Intracytoplasmic Sperm Injection)
ICSI is an advanced fertility technique. A single healthy sperm is injected dire…
IUI (Intrauterine Insemination)
IUI (Intrauterine Insemination) is a fertility treatment where washed, concentra…
FAQs about Semen Analysis
What does a semen analysis test?
Semen analysis (sperm test/seminogram) measures: (1) Volume — amount of ejaculate (normal ≥1.4mL); (2) Sperm concentration — millions of sperm per mL (normal ≥16M/mL); (3) Total sperm count — concentration × volume (normal ≥39M); (4) Motility — % of sperm moving (normal total ≥42%; progressive ≥30%); (5) Morphology — % of sperm with normal shape (normal ≥4% Kruger strict); (6) Vitality — % live sperm (normal ≥54%). The most clinically useful number is Total Motile Sperm Count (TMC = concentration × volume × progressive motility%).
What is a normal sperm count?
WHO 2021 lower reference limits (5th percentile of fertile men): sperm concentration ≥16 million/mL; total motility ≥42%; progressive motility ≥30%; morphology ≥4% normal; volume ≥1.4mL; total sperm ≥39 million per ejaculate. A result above all these values is considered normal. A result below one or more values is abnormal to that degree. Total Motile Sperm Count (TMC) >20M post-wash = IUI viable; TMC 5–20M = borderline (IUI may work); TMC <5M = IVF/ICSI pathway.
How should I prepare for a semen analysis?
Preparation: (1) 2–7 days of sexual abstinence before the test — shorter gives lower volume; longer gives more dead sperm; (2) Produce sample by masturbation into the sterile container provided — do not use a regular condom (contains spermicide); (3) Collect the complete ejaculate — the first fraction has the highest sperm concentration; (4) Deliver to the lab within 1 hour; keep sample at body temperature (pocket or armpit); (5) Avoid alcohol, illness, or fever in the 2–3 months before the test as these temporarily reduce sperm parameters.
If my semen analysis is abnormal, what happens next?
One abnormal result is not enough to diagnose male factor infertility — always repeat after 74 days (one spermatogenesis cycle) as temporary illness, fever, or stress can cause transient decline. If repeat is also abnormal: (1) Mild abnormality (TMC 5–20M) → investigate cause (varicocele, hormones, lifestyle) + IUI; (2) Moderate abnormality (TMC 1–5M) → ICSI/IVF + consider DNA fragmentation testing; (3) Severe (azoospermia or TMC <1M) → hormone panel (FSH, LH, testosterone) + karyotype + Y microdeletion test + urology referral for surgical sperm retrieval assessment.
Does a normal semen analysis mean I am fertile?
Not necessarily — a normal semen analysis is reassuring but does not guarantee fertility. It measures sperm quantity and basic quality parameters but does NOT measure: DNA fragmentation (the genetic integrity of sperm — normal-looking sperm can carry broken DNA); anti-sperm antibodies; functional ability to fertilise an egg; or epigenetic factors. Studies show 15–25% of men with recurrent miscarriage or failed IVF with normal semen analysis have elevated DNA fragmentation (DFI >25%) — which requires a specific SCSA/DFI test.
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