One low report is not a diagnosis.

Oligospermia means a sperm count below the WHO 2021 lower reference limit: fewer than 16 million sperm per ml, or fewer than 39 million in the whole sample.

Those limits are the level of the lowest 5% of men whose partners conceived within a year. They are not a pass mark. Men below them father children naturally, and men above them sometimes cannot. Doctors often call it mild, moderate or severe; severe means only a few million per ml.

Yes, many couples conceive with a mildly low count, but the lower the count, the longer it tends to take and the more likely treatment is needed.

Count is one number of several. Movement, shape and volume are read with it. Her age, egg reserve and tubes matter just as much. That is why the plan is made for both of you, not from his report alone.

A low count must be confirmed on a second sample, a few weeks to three months later, because counts vary a lot in the same man.

A fever, a recent illness, a short gap since last ejaculation, or a spilled sample can all read falsely low. Give the sample after 2 to 7 days without ejaculation, collect all of it, use no lubricant, and get it to the lab within an hour. If it is still low: an examination for varicocele and testis size, and hormone tests (FSH, LH, testosterone, prolactin, thyroid). When the count is very low, usually under 5 million per ml, guidelines advise a chromosome test and a Y-chromosome test.

Common causes are varicocele, testosterone or steroid use, hormone problems, genetic causes, past infection, heat, smoking, alcohol, excess weight and some medicines, and treatment starts with whichever of these is found.

Stopping steroids, correcting a hormone deficiency, treating infection or thyroid disease, controlling diabetes, and repairing a significant varicocele in selected men can all raise the count. Hormone tablets without a proven deficiency are not a treatment. In many men no cause is found; that does not stop treatment.

IUI can suit a mild low count when enough moving sperm are left after washing and her tests are normal; IVF with ICSI is the better route when the count is low or other factors are present.

ICSI injects one sperm into each egg, so it needs only a few. IUI is simpler but needs more moving sperm and at least one open tube. If IUI is tried, agree the number of cycles first, so it does not drift on for a year.

Stopping smoking, cutting alcohol, losing excess weight, keeping the testes cool and stopping testosterone or steroids are worth doing, and in a mild case they can raise the count.

Changes take at least 3 months to show in a report. They will not correct a genetic cause or reverse severe testicular damage. Expensive antioxidant courses have weak evidence for improving the chance of a baby.