A male hormone panel measures the signals that drive sperm production. A semen analysis measures what is actually being produced. They answer different questions, and clinical guidelines recommend starting with the semen analysis, then adding hormone testing when there is a specific reason to look.

Private health testing has made male fertility far easier to look into than it used to be. You can order a hormone panel online, take a finger-prick sample at your kitchen table, and have numbers back within days. No referral, no waiting list, no conversation with anyone you would rather not have it with.

The trouble is that most men buy those tests in the opposite order to the one the clinical guidelines recommend. Not because they have been misled, but because a blood test is simply the easier thing to buy. Here is what a hormone panel does tell you, what it cannot, and which test answers the question you are actually asking.

What a male hormone panel actually tells you

A male hormone panel looks at the endocrine system that instructs the testes to produce sperm. The Goodbody Clinic panel measures follicle stimulating hormone (FSH), luteinising hormone (LH), testosterone, sex hormone binding globulin (SHBG), prolactin and the Free Androgen Index.

Each of these describes a different part of the chain. FSH and LH are released by the pituitary gland and act as the instructions sent to the testes: FSH drives sperm production, while LH prompts the production of testosterone. Testosterone itself matters for sperm production as well as for libido and sexual function. Prolactin can point towards other causes when it sits outside its expected range.

This is genuinely useful information. A hormone panel can identify a hormonal cause that is treatable, and it becomes directly relevant when there are symptoms such as reduced libido or difficulty with erections. It also gives useful context if a semen analysis has already come back with unexpected results, because it helps explain why.

What a hormone panel cannot tell you

It cannot tell you how much semen there is, how many sperm are in it, whether they are moving forwards, what shape they are, or how many are alive. Those are physical measurements taken by examining a sample under a microscope, and nothing in a blood result substitutes for them.

This is the part that surprises people. It is entirely possible for every hormone in a panel to sit comfortably inside its reference range while semen parameters fall below the WHO lower limits. The instructions can be sent correctly and the output can still fall short, for reasons a blood test is not designed to detect: a varicocele, a previous infection, an obstruction, genetic factors, or the effects of heat, medication or illness on sperm production.

It works the other way round too. Normal semen parameters do not rule out a hormonal issue worth investigating, particularly where there are symptoms. The two tests are not competing. They are simply not substitutes for each other.

Why clinical guidelines start with the semen analysis

The joint guideline from the American Urological Association and the American Society for Reproductive Medicine is unusually direct on this point. It recommends that clinicians include one or more semen analyses during the initial evaluation of the male, as a strong recommendation supported by Grade B evidence.

On hormone testing, the same guideline states that an endocrine evaluation is not recommended as a primary first-line test in the evaluation of male infertility. It sets out when hormone testing is indicated instead: where there is impaired libido or erectile dysfunction, where a semen analysis has shown a low sperm count or none at all, where the testes are unusually small, or where a physical examination suggests a hormonal abnormality.

In other words, hormone testing has a clear and important role. It is just not usually the opening move. In the UK, NICE guideline NG257, published in March 2026, sets the WHO reference values as the standard against which a semen analysis should be interpreted, which makes semen analysis the anchor of a male fertility assessment rather than an optional extra.

What a full semen analysis measures

A laboratory semen analysis reports a set of measurements against the lower reference limits published in the sixth edition of the WHO laboratory manual in 2021. The main ones look like this.

Measure	WHO 2021 lower limit	What it describes
Semen volume	1.4 ml	The total amount of fluid produced
Sperm concentration	16 million per ml	How densely populated the sample is
Total sperm number	39 million per ejaculate	How many sperm the whole sample contains
Progressive motility	30 per cent	The proportion swimming actively forwards
Normal morphology	4 per cent	The proportion of normally formed sperm
Vitality	54 per cent	The proportion that are alive

Morphology is worth pausing on, because it is the measurement most often missing from cheaper tests. Sperm that are misshapen may struggle to fertilise an egg even when the count and motility figures look reassuring, which is why the guidelines treat it as a core parameter rather than a refinement.

One thing to hold onto when reading a report: these are lower reference limits taken from the fifth percentile of men who conceived, not a pass mark. A result slightly below a limit does not mean someone cannot conceive, and results comfortably above them are not a guarantee. They are reference points for a conversation, which is why results are best interpreted by someone qualified to put them in context. There is a fuller walk-through of what counts as a normal sperm count in the UK, and of how far a single figure can reasonably be read, if it helps to see the numbers in context.

Can you do this properly at home?

Partly, and the distinction matters more than the marketing usually admits. Two quite different things are sold as home sperm tests, and which of the two you buy is what decides how accurate a home sperm test actually is.

The first is a device or smartphone kit. You collect a sample and the device or app analyses it where you are, giving a result in minutes. These are convenient, inexpensive and useful as a first look, but what they measure is limited by what the device can see.

The second is home-to-lab testing. You collect the sample at home and post it to an accredited laboratory, which carries out a full analysis to the same WHO standards used by NHS and private fertility clinics. Two claims about this route circulate widely and are worth correcting.

That home tests cannot measure morphology. This is true of device kits and not of home-to-lab testing. Morphology is assessed by examining sperm under a microscope, so whether it is measured depends on whether a laboratory sees the sample, not on where the sample was collected.

That a sample must reach a laboratory within an hour. This figure is correct for an untreated sample, which is why clinics ask for samples to be produced on site or delivered quickly. It does not apply in the same way to kits that stabilise the sample and control its temperature in transit. Malebox At-Home Sperm Test kits are validated for 72 hours on the inbound journey. The average time between sample collection and analysis is approximately 30 hours. Royal Mail Tracked 24 is used to minimise delays, and the temperature-controlled packaging is designed to maintain sample integrity throughout the normal transit window.

The semen analysis available through Goodbody Clinic uses the home-to-lab route. Samples are analysed by Malebox, where analysis is carried out by Health and Care Professions Council (HCPC) registered clinicians following WHO guidelines, and results are explained in a video consultation with a Nursing and Midwifery Council (NMC) registered fertility nurse rather than emailed over as a set of numbers to interpret alone.

So which should you start with?

It depends on what prompted the question.

• If you are simply curious about your reproductive health and have no symptoms, start with a semen analysis. It answers the question directly.
• If you and a partner are trying to conceive, the NHS advises seeing a GP after a year of trying, and sooner if your partner is aged 36 or over or either of you already knows of a possible fertility issue. A semen analysis is the test that covers the male half of that assessment.
• If there are symptoms such as reduced libido or difficulty with erections, hormone testing becomes directly relevant, and doing both together makes sense.
• If you are checking after a vasectomy, a semen analysis is the only test that answers it. Hormones are not relevant to that question.
• If a semen analysis has already come back outside the reference ranges, this is exactly the point at which a hormone panel earns its place, and it is what the guidelines recommend.

If a result comes back outside the reference range

One result is not a verdict. Semen quality varies naturally from sample to sample, and a single set of numbers is a snapshot rather than a settled fact.

NICE guideline NG257 recommends that where a first semen analysis is abnormal, a repeat confirmatory test should be offered. It advises undertaking that repeat ideally three months after the first, because that is roughly how long the cycle of sperm formation takes to complete, so a repeat any sooner may simply re-measure the same period. The exception is where there is a severe deficiency, in which case the repeat should be arranged as soon as possible.

That three month window is also, usefully, the period over which changes to sleep, alcohol, heat exposure, weight and medication can begin to show up in a new sample. A first result outside the range is far more often a starting point than a conclusion.

Frequently asked questions

Can a blood test tell me if I am fertile?

No. A hormone panel measures the signals that drive sperm production, but it cannot measure sperm count, motility, morphology or vitality. Clinical guidelines recommend a semen analysis for that, with hormone testing added where there are specific findings or symptoms.

Do I need both a hormone panel and a semen analysis?

Not always. Guidelines recommend starting with a semen analysis, and adding hormone testing where there is reduced libido or erectile dysfunction, a low or absent sperm count, unusually small testes, or a physical sign of a hormonal cause.

How accurate is an at-home semen analysis?

It depends on the type. Device and smartphone kits measure a limited set of parameters where you are. Home-to-lab kits are analysed in an accredited laboratory to WHO standards, which covers the full parameter set including morphology.

How long should I abstain before a semen analysis?

Most providers advise between two and seven days without ejaculating, because both shorter and longer gaps can skew the results. Follow the specific instructions from whoever is analysing your sample, as advice varies slightly between laboratories.

What happens if my results are outside the reference range?

A repeat confirmatory test is normally offered, ideally around three months later to allow a full cycle of sperm formation. Reference limits are the fifth percentile of men who conceived, so a result below one is not a diagnosis on its own.

Where to start

If you are looking into your reproductive health for the first time, a semen analysis is the test that answers the central question, and the one the guidelines put first. Goodbody Clinic offers home-to-lab semen analysis analysed by Malebox, alongside the male hormone panels that add context when there is a reason to look at them, as part of a wider range of men's health blood tests.

Want the complete picture in one go?

If you and a partner are trying to conceive, or you have symptoms alongside your questions about fertility, you may prefer not to sequence the tests at all. Taken together, the Male Fertility Test (£240) and the Male Hormone and Fertility Blood Test (from £79) cover both sides of the assessment in one round of testing: what is being produced, and the hormone signals behind it. That is the complete male half of a fertility work-up, without a second wait for answers. You can see both tests, and everything else available for men, on our men's health tests page.

This article is for information and does not replace individual medical advice. If you have concerns about your reproductive health, speak to a GP or a fertility specialist.