Male Fertility Blood Test UK (2026): Hormones, Sperm DNA & Private Costs
Important — read this first
A blood test is not the first-line test for male fertility — a semen analysis is. Blood panels measure hormones, not sperm. If you are worried about fertility and have not had a semen analysis, start there (free on the NHS via your GP). Hormone blood work is a second-line investigation, ordered when semen analysis is abnormal. This guide is information, not medical advice; if you and your partner have been trying to conceive without success, see your GP. Full disclaimer.
Male factor is involved in roughly 40–50% of couple infertility cases, yet male fertility testing is widely misunderstood — partly because men are routinely sold "fertility blood tests" that do not actually measure the thing that matters. This guide sets the record straight: what semen analysis tells you (and why it comes first), when a hormone blood panel is genuinely useful, where sperm DNA fragmentation testing fits, what it all costs in the UK in 2026, and the lifestyle factors that have real evidence behind them.
The 90-second answer
If you only read one box
- Semen analysis is the first-line test. It measures sperm count, motility and morphology directly. NHS-free via GP; private £100–£250. A blood test cannot replace it.
- A male fertility blood panel is second-line — testosterone, LH, FSH, SHBG, prolactin, oestradiol, TSH. Useful when semen analysis is abnormal, to find a hormonal cause. £55–£149.
- Sperm DNA fragmentation testing (£150–£300) is a specialist add-on for unexplained infertility, recurrent miscarriage or failed IVF — not a routine first test.
- NHS pathway is free and investigates the couple together. Use it after 12 months trying (6 months if the female partner is 36+).
- Sperm takes ~3 months to make, so lifestyle changes need three months before a repeat semen analysis shows any effect.
- Best private picks: Medichecks Male Hormone Advanced (~£79) for the blood panel; AlphaBiolabs or easyDNA for sperm DNA fragmentation.
First line: semen analysis (not a blood test)
Semen analysis is the single most important test in assessing male fertility. It measures what blood cannot: how many sperm there are, whether they move properly, and whether they are the right shape. It is offered free on the NHS via GP referral, and privately at £100–£250 through fertility clinics and some private labs.
WHO 2021 reference values
The World Health Organization's sixth-edition (2021) lower reference limits — the 5th percentile of men who fathered a child within 12 months — are the standard UK benchmark:
| Parameter | WHO 2021 lower limit | What it means |
|---|---|---|
| Semen volume | ≥1.4 ml | Total fluid per ejaculate |
| Sperm concentration | ≥16 million/ml | Density of sperm |
| Total sperm number | ≥39 million per ejaculate | Total sperm count |
| Total motility | ≥42% | Proportion moving |
| Progressive motility | ≥30% | Proportion swimming forward |
| Normal morphology | ≥4% | Proportion normally shaped |
| Vitality | ≥54% | Proportion alive |
A few honest caveats. These are reference limits, not pass/fail lines — a result just below a threshold does not mean infertility, and a result above does not guarantee conception. Sperm parameters vary substantially between samples, so an abnormal result is normally repeated after about three months before any conclusions are drawn. And morphology at "4% normal" sounds alarming until you realise that is the expected reference — most sperm in fertile men are morphologically abnormal.
Second line: the male fertility blood panel
Blood testing comes into play when semen analysis is abnormal (low count, low motility, or azoospermia — no sperm), or when there are clinical signs of a hormonal problem (low libido, erectile dysfunction, small testes, gynaecomastia). The job of the blood panel is to work out why the semen analysis is abnormal: is it a testicular problem, or a problem with the pituitary signals that drive the testes?
What's in the panel
- Total testosterone — the main male sex hormone. Test in the morning (before ~11am) when levels peak. Low testosterone can impair sperm production.
- LH (luteinising hormone) — the pituitary signal that drives testosterone production. High LH suggests the testes are failing to respond; low LH suggests a pituitary cause.
- FSH (follicle-stimulating hormone) — the pituitary signal that drives sperm production directly. A raised FSH is a strong marker of impaired sperm production within the testes.
- SHBG + calculated free testosterone — SHBG binds testosterone; measuring it lets the lab calculate how much testosterone is biologically available.
- Prolactin — raised prolactin (from a pituitary tumour, medication or stress) suppresses the fertility hormones and is an important, treatable cause to exclude.
- Oestradiol — relevant where aromatase activity is high (e.g. obesity), which can shift the testosterone:oestrogen balance and affect fertility.
- TSH (thyroid) — both over- and under-active thyroid can impair male fertility, so thyroid is part of a thorough workup.
Reading the pattern
| Pattern | Likely interpretation | Next step |
|---|---|---|
| High LH & FSH + low testosterone | Primary testicular failure | Urology/fertility referral; consider karyotype |
| Low LH & FSH + low testosterone | Secondary (pituitary/hypothalamic) hypogonadism | Investigate pituitary; prolactin, MRI may follow |
| Isolated raised FSH, normal testosterone | Impaired sperm production (Sertoli cell) | Correlate with semen analysis |
| Raised prolactin | Possible prolactinoma or drug effect | Repeat; review meds; pituitary imaging if confirmed |
| All normal + normal semen analysis | Hormonal axis intact | Look elsewhere (couple workup) |
One critical warning about testosterone
If low testosterone is found, do not start testosterone replacement therapy (TRT) while trying to conceive. TRT switches off the pituitary signals (LH/FSH) that drive sperm production and can cause temporary — occasionally permanent — infertility. A fertility specialist will instead investigate the cause and, where appropriate, use treatments such as hCG or clomifene that raise testosterone while preserving sperm production. See our private testosterone test guide for the wider picture.
Sperm DNA fragmentation testing
Standard semen analysis counts and grades sperm but does not look inside them. Sperm DNA fragmentation testing measures the proportion of sperm carrying damaged DNA — the DNA fragmentation index (DFI). High DNA fragmentation can impair fertilisation, embryo development and implantation, and is associated with miscarriage, even when count, motility and morphology look normal.
When it's relevant
- Unexplained infertility — normal semen analysis but no conception.
- Recurrent miscarriage — sperm DNA damage can contribute.
- Failed or poor-quality IVF/ICSI cycles — may explain repeated failure.
- Older paternal age, smoking, varicocele, high heat or toxin exposure — risk factors for higher fragmentation.
When it's not worth it
- As a routine first test in someone with no specific risk factors.
- When semen analysis is already clearly abnormal — you have your answer.
- When the result wouldn't change your management. Discuss with a specialist first.
Sperm DNA fragmentation testing costs roughly £150–£300 in the UK in 2026. Two affiliate-partnered routes worth knowing about:
AlphaBiolabs — a UKAS-accredited UK laboratory (Warrington) offering sperm-related and DNA testing alongside their well-known relationship-DNA services. If you want a UK lab with strong accreditation credentials, see AlphaBiolabs. Their accreditation pedigree is the same one behind their legal paternity testing, which gives a sense of their lab standards.
easyDNA — offers a range of male and relationship DNA tests in the UK. If you are comparing providers for sperm/DNA testing, see easyDNA as an alternative. Always confirm the specific test offered (sperm DNA fragmentation vs other DNA services) and the methodology before ordering.
Many fertility clinics also offer DNA fragmentation as part of an IVF workup, which has the advantage of consultant interpretation tied directly to your treatment plan.
UK male fertility test costs in 2026
| Test | Typical UK price | NHS-funded? |
|---|---|---|
| Semen analysis | NHS free / private £100–£250 | Yes, via GP referral |
| Male fertility hormone panel | £55–£149 | Yes, when criteria met |
| Sperm DNA fragmentation (DFI) | £150–£300 | Rarely |
| Karyotype / genetic testing | £200–£400 private | Yes, when indicated (e.g. azoospermia) |
| Scrotal ultrasound (varicocele) | £150–£350 private | Yes, when indicated |
| Full private male workup (SA + bloods + review) | £250–£500 | Equivalent free via NHS pathway |
Provider picks
For the hormone blood panel — Medichecks. The Medichecks Male Hormone Advanced panel at around £79 covers testosterone, free testosterone, SHBG, LH, FSH, prolactin, oestradiol and TSH — exactly the second-line panel described above, with a doctor's report. Fingerprick home kit or clinic venous draw. This is the most cost-effective way to get the male fertility hormone picture privately.
For sperm DNA fragmentation — AlphaBiolabs or easyDNA. AlphaBiolabs (UKAS-accredited UK lab) and easyDNA both offer DNA/sperm testing routes; confirm the exact test and methodology when ordering. For DNA fragmentation tied to an IVF plan, a fertility clinic remains the gold-standard route because interpretation is linked to treatment.
For semen analysis — a fertility clinic or your NHS GP. Semen analysis needs a proper andrology lab with strict timing (sample analysed within ~1 hour). The NHS route is free and reliable; private fertility clinics (Create, CRGH, The Lister, Bourn Hall and regional units) offer faster turnaround with consultant review.
The NHS pathway for male fertility
- GP appointment. The GP assesses both partners' history. For the male partner this includes past illnesses (mumps, undescended testes, surgery, chemotherapy), medications, lifestyle and examination. Referral criteria are time-based: 12 months of trying, or 6 months if the female partner is 36+, or sooner with known risk factors.
- Semen analysis. Free, arranged through the GP. If abnormal, it is repeated after about three months before conclusions are drawn.
- Hormone bloods + referral. If semen analysis is abnormal, the GP or fertility clinic arranges testosterone, LH, FSH and prolactin, and refers to a fertility clinic or urologist.
- Specialist investigation. Depending on findings: scrotal ultrasound (varicocele), karyotype and Y-chromosome microdeletion testing (in azoospermia), and treatment planning. Note that genetic causes of male infertility connect to the same Y-chromosome biology covered in our Y-chromosome DNA test guide.
- Treatment. Lifestyle optimisation, treatment of reversible causes, surgical sperm retrieval where needed, and IVF/ICSI subject to local NHS funding criteria (which have tightened — many areas fund zero or one cycle).
What actually affects sperm quality
Because sperm take about three months to develop, lifestyle changes need roughly a full cycle to show up on a repeat semen analysis. Here is the honest evidence picture:
Strong, consistent evidence
- Smoking — reduces count, motility and increases DNA fragmentation. Stopping helps.
- Heavy alcohol — lowers testosterone and sperm quality. Moderation matters.
- Obesity — associated with lower testosterone, higher oestradiol and worse sperm parameters. Weight loss can help.
- Scrotal heat — hot tubs, saunas, prolonged laptop-on-lap, very tight underwear and some occupational heat exposure transiently lower sperm production. Reduce where practical.
- Anabolic steroids and testosterone (TRT) — strongly suppress sperm production. A common and reversible-but-not-always cause.
Mixed or modest evidence (be honest)
- Antioxidant supplements (zinc, folate, CoQ10, selenium, vitamins C/E, L-carnitine) — some trials suggest modest improvements in sperm parameters, but the largest, best-conducted trial (MOXI) found no benefit on semen parameters or live birth. Correcting a true deficiency is sensible; a standard fertility supplement is low-risk but should not be expected to fix a significantly abnormal result.
- Diet quality — Mediterranean-style diets are associated with better sperm parameters, but the evidence is observational.
- Mobile phones, tight cycling, caffeine — frequently blamed, weak or inconsistent evidence. Don't over-worry; focus on the proven factors.
Related guides
- Fertility blood test UK — the couple-level overview covering female and male testing together.
- Pre-IVF blood tests UK — what your clinic will order before an IVF cycle.
- Best men's health blood test UK — the broader male-health panel guide.
- Private testosterone test UK — testosterone testing and the TRT-vs-fertility issue in detail.
- Testosterone blood test guide — the science of testosterone measurement.
- Thyroid blood test guide — thyroid's underappreciated role in male fertility.
- Paternity test UK — for context on AlphaBiolabs' UKAS lab accreditation.
- Y-chromosome DNA test UK — the genetics behind some male infertility causes.
- Private blood tests UK — pillar guide — the complete UK private testing playbook.