Semen Analysis — Procedure Guide, Recovery & Risks | MyMedicPlus

Semen analysis (seminogram) is a comprehensive laboratory test that evaluates both the quantitative and qualitative characteristics of a semen sample to assess male fertility potential. It is the cornerstone of the initial male fertility evaluation and is essential in the assessment of any couple experiencing difficulty conceiving, as male factor infertility contributes to approximately 40–50% of all cases.

The analysis measures multiple parameters as defined by the World Health Organisation (WHO) 2021 Reference Values, derived from fertile men whose partners conceived within 12 months: semen volume, sperm concentration (number per millilitre), total sperm count, total motility, progressive motility (forward-swimming sperm), sperm morphology (shape, using Kruger strict criteria), vitality (proportion of live sperm), and pH. Results are categorised using standardised terminology: azoospermia (no sperm), oligospermia (low count), asthenospermia (poor motility), teratospermia (poor morphology), and oligoasthenoteratospermia (OAT, all three parameters abnormal — the most common finding in infertile men).

Semen analysis provides a functional assessment of the male reproductive tract and guides the selection of appropriate fertility treatments — from lifestyle modification and antioxidant supplementation through to intrauterine insemination (IUI), in vitro fertilisation (IVF), or intracytoplasmic sperm injection (ICSI).

Semen analysis is indicated as part of the standard initial workup for couples who have been trying to conceive without success for 12 months (or 6 months if the female partner is over 35 years). It should be performed in parallel with female fertility investigations rather than sequentially, since male factor is identified in 40–50% of infertile couples and testing in parallel saves valuable time.

Other specific indications include: men with a history of cryptorchidism (undescended testes), testicular torsion, orchitis (including mumps orchitis), chemotherapy or radiotherapy to the pelvis or gonads, previous vasectomy or vasectomy reversal, varicocele (varicose veins of the testes), suspected retrograde ejaculation (diabetes, alpha-blockers, prior bladder neck surgery), and genetic conditions associated with infertility (Klinefelter syndrome 47,XXY, Y chromosome microdeletions).

Men planning to bank sperm (fertility preservation) before chemotherapy, radiotherapy, or gender-affirming therapy should have semen analysis performed to assess quality before and guide storage decisions. A single abnormal semen analysis should always be repeated after 2–4 weeks (allowing one spermatogenesis cycle) before diagnosing a pathological condition, as semen quality varies significantly between samples.

Abstinence from ejaculation for 2–5 days before the test is required to standardise results: too short an abstinence period reduces volume and count, while longer abstinence reduces motility. The recommended interval is 2–7 days per WHO protocol.

The sample is collected by masturbation into a sterile, non-toxic, wide-mouthed container provided by the laboratory. Collection on-site at the laboratory (in a designated private room) is preferred to ensure the sample is processed within the mandatory 60-minute window. Home collection is acceptable if the sample is maintained at body temperature and delivered to the laboratory within 30–60 minutes. Special non-toxic collection condoms are available for couples with religious or personal objections to masturbation.

In the laboratory, the sample is allowed to liquefy at 37°C for 20–30 minutes before analysis begins. Semen volume is measured by weighing or in a graduated collection vessel. Sperm concentration is determined using a haemocytometer (Makler chamber) or computer-assisted sperm analysis (CASA). Motility is assessed by observing at least 200 spermatozoa under 200× magnification, classifying each as progressively motile (forward movement), non-progressively motile, or immotile. Morphology is assessed using Papanicolaou or Diff-Quik staining and Kruger strict criteria (only sperm with a perfectly oval head, intact midpiece, and uncoiled tail are classified as normal). Additional tests include anti-sperm antibodies, fructose level (seminal vesicle function), and post-centrifugation search for sperm in azoospermic samples.

Semen analysis requires no physical recovery as it is a laboratory test rather than a procedure. Results are typically available within 24–48 hours. At least two separate semen analyses, performed 2–4 weeks apart, are required before any diagnosis is made, as there is inherent biological variability between samples of 20–30% in healthy men.

If results are abnormal, the clinical team will arrange further investigation: serum hormones (FSH, LH, testosterone, prolactin) to differentiate between pre-testicular, testicular, and post-testicular causes; scrotal ultrasound to identify varicocele, testicular atrophy, or epididymal abnormalities; genetic karyotype and Y-chromosome microdeletion analysis for azoospermic and severely oligospermic men; and post-ejaculate urinalysis to check for retrograde ejaculation.

Many men experience anxiety about semen analysis results, and counselling is an important component of care. Abnormal results do not always mean a couple cannot conceive naturally, particularly with mild abnormalities, and effective treatments exist across the full spectrum of male factor severity.

Semen analysis carries no physical risks or adverse effects — it is entirely non-invasive and painless. The main concern associated with abnormal results is psychological distress, including anxiety, depression, reduced self-esteem, and relationship strain. Male infertility carries significant cultural and social stigma in many communities, and patients may require psychological support alongside medical management.

False-normal results can occur if abstinence guidelines are not followed, the sample is not delivered to the laboratory within 60 minutes, the container is not appropriately sterile, or the analysis is performed by an inadequately trained laboratory. False-abnormal results similarly arise from illness, fever, stress, alcohol excess, or extreme heat exposure in the 70 days before the sample (the duration of spermatogenesis), which is why repeat testing after 2–4 weeks under standardised conditions is essential.

It should be noted that semen analysis assesses sperm quantity and basic functional parameters but does not measure DNA fragmentation, oxidative stress, or epigenetic quality — specialised testing (sperm DNA fragmentation index, DFI) is available for couples with recurrent miscarriage or repeated IVF implantation failure despite normal standard parameters.

Semen analysis is a rapid, non-invasive, and relatively inexpensive investigation that provides essential information guiding the most efficient fertility treatment pathway. Identification of severe male factor at the outset directs the couple to IVF with ICSI rather than prolonged expectant management or IUI, significantly improving time-to-pregnancy and reducing emotional and financial burden.

WHO 2021 reference values (fifth percentile of fertile men): volume ≥1.4 mL, sperm concentration ≥16 million/mL, total sperm count ≥39 million per ejaculate, total motility ≥42%, progressive motility ≥30%, morphology (Kruger strict) ≥4% normal forms, and vitality (live sperm) ≥54%. Results below these values warrant further investigation but do not exclude natural conception, as there is considerable overlap between fertile and infertile populations.

Repeat semen analysis after lifestyle modification (cessation of smoking, reduction in alcohol, weight loss, heat avoidance, antioxidant supplementation with zinc and folate) shows statistically significant improvement in sperm parameters in randomised trials, particularly for oligospermia and asthenospermia. This inexpensive, modifiable intervention can meaningfully improve natural conception chances before assisted reproduction.