The Bad Semen Analysis: What a Specialist Does Next

The laboratory report uses a word that looks like a diagnosis: oligo-astheno-teratozoospermia. It is not a diagnosis. It is a description, three Greek fragments meaning too few, too slow, too many abnormal forms, and the European Academy of Andrology has published a guideline on exactly what a physician should do when it appears.

First, the label has to be earned

The guideline's opening demand is the one most often skipped: two semen analyses, performed to World Health Organization methodology, before the term oligo-astheno-teratozoospermia is applied at all. Regular readers of this journal know why. A single sample swings with illness, abstinence time, even the season it was collected in. One abnormal result opens an investigation. It is never allowed to close one.

The guideline also states the uncomfortable truth up front: in the majority of cases, the cause is never identified. That is exactly why the workup exists, because the minority of cases with a findable cause are the ones where finding it changes everything.

The examination the laboratory cannot do

Before any treatment talk, the academy recommends hands and instruments. A general physical examination looking for signs of hypogonadism. A scrotal examination assessing the testes and epididymes for volume and consistency, checking the deferent ducts, the tubes that carry sperm out, for partial or complete absence, and feeling for a varicocele, an enlargement of the veins around the testis.

Then a scrotal ultrasound as part of the routine investigation, not as an optional extra. And an endocrine evaluation, the hormone panel, with prolactin added when the pattern suggests the signal from the pituitary itself is failing. Every station on that list can quietly reclassify a man's situation, which is why a laboratory report alone, read at home, resolves nothing.

When the genetics enter

At sperm concentrations of 5 million/mL or below, the guideline recommends two genetic tests: a karyotype, the count and structure of the chromosomes, and analysis for Y-chromosome microdeletions, missing fragments of the male chromosome's fertility region.

The yield justifies the threshold. In men with fewer than one million sperm per ejaculate, microdeletions turn up in about 8.5 percent; between one and ten million, in 0.3 percent. These results are not academic. A translocation raises the risk of unbalanced chromosomes in an embryo, and a microdeletion passes to a son. This is information a couple deserves before treatment, not after.

The contraindication that surprises everyone

Here is the recommendation the guideline issues at its strongest grade, and it runs against most men's instinct: testosterone therapy to improve fertility is contraindicated.

The mechanism is the reason. Testosterone from outside tells the pituitary the body has plenty, the pituitary stops sending its signals, and sperm production, which depends on those signals and on locally produced testosterone inside the testis, winds down. The guideline's sequence for men who genuinely are hypogonadal is explicit: complete the fertility treatment first, offer replacement after. We have covered the TRT and fertility problem in depth separately; the guideline compresses it into one line of prescribing discipline.

The honest treatment picture

This is where the guideline earns trust, because it declines to oversell. FSH treatment, injections of the hormone that drives sperm production, "can be suggested" in selected men with normal hormone signals and unexplained low counts, graded as weak with very low evidence. Antioxidants: the academy cannot recommend for or against. Anti-estrogens and aromatase inhibitors: the same verdict. Varicocele surgery: the evidence is contradictory enough that the guideline refuses a blanket rule and recommends an individual discussion with the couple, with clearer grounds when testicular function is progressively deteriorating.

On lifestyle it suggests what the rest of this journal documents in detail: stop smoking, reduce excess weight, cut excessive alcohol. And it adds two myth-corrections with its stronger grade: do not tell men to stop exercising, and do not prescribe scrotal cooling or clothing changes as fertility measures, because the evidence for the underwear folklore simply is not there.

Finally, the strongest positive recommendation in the document: when treatment options are unavailable or insufficient, assisted reproduction is recommended outright, from insemination through IVF and ICSI, where a single sperm is injected directly into the egg. Knowing when to stop optimizing and start assisting is itself a specialist judgment.

What this means if the envelope is on your table

An abnormal semen analysis is a beginning, and the European map for what follows is public, systematic and short: confirm it properly, examine the man and not just the sample, measure the hormones, image the scrotum, test the genetics when the numbers are low enough, and be honest about which treatments have evidence. Skip the shortcuts, especially the one in a testosterone vial.

That map is precisely the assessment we run. Not because a guideline demands it, but because every station on it exists to catch the case where the story changes, and those cases are only ever found by looking.

Most men sit with an abnormal result for far longer than they should, because the words on it are frightening and nobody has translated them. Fear feeds on not knowing, and this is a findable answer: what the result actually says, what it does not say, and what happens next. You leave the consultation with all three.

And if you are reading this for your partner: that is a normal way for this conversation to start. Either of you can begin it.