Medically reviewed by Dr. Shweta Agarwal, MBBS, DGO. Last updated: June 2026.
Information on this page is educational and does not replace a medical consultation. Outcomes depend on individual clinical factors.
What exactly is azoospermia?
Azoospermia is the complete absence of sperm in the ejaculate, confirmed on a properly performed semen analysis (including examination of the spun-down, centrifuged sample). It is different from a low sperm count — here, no sperm are seen at all. A single result is never enough; the diagnosis requires confirmation on a repeat sample.
The single most important step after diagnosis is determining why there are no sperm, because the cause determines the options. Azoospermia falls into two broad categories:
| Type | What it means |
|---|---|
| Obstructive azoospermia (OA) | Sperm are being produced normally in the testicles, but a blockage prevents them from reaching the ejaculate. The "factory" works; the "pipeline" is blocked. |
| Non-obstructive azoospermia (NOA) | Sperm production in the testicles is reduced or absent, usually due to a problem with the testicles themselves, hormones, or genetics. |
In Marathi and Hindi, this is described as वीर्यात शुक्राणू नसणे (no sperm in semen) — a term your doctor may use during a private consultation. This is a common, recognised medical condition, and it is investigated without judgement.
What causes azoospermia?
The causes differ by type.
Causes of obstructive azoospermia (OA)
- Previous vasectomy (a deliberate blockage for contraception).
- Infection or inflammation of the reproductive tract causing scarring.
- Congenital absence of the vas deferens (CBAVD) — sometimes linked to cystic fibrosis gene changes.
- Blockage at the epididymis, ejaculatory ducts, or elsewhere in the pathway.
Causes of non-obstructive azoospermia (NOA)
- Testicular failure — reduced or absent sperm production within the testicle.
- Hormonal causes — problems with the hormonal signals (from the brain) that drive sperm production.
- Genetic causes — such as Klinefelter syndrome or Y-chromosome microdeletions.
- Varicocele — enlarged veins in the scrotum that can impair sperm production. See our male infertility page.
- Prior chemotherapy or radiation — gonadotoxic cancer treatment.
Does azoospermia cause symptoms?
Often there are no symptoms at all, and azoospermia is discovered only when a couple investigates difficulty conceiving — the semen looks completely normal to the eye, because seminal fluid is produced separately from sperm. In some men, depending on the cause, there may be:
- A history of an undescended testicle, mumps after puberty, or genital infection.
- Small or soft testicles (more often in non-obstructive azoospermia).
- Symptoms of low testosterone (reduced libido, low energy) in some hormonal cases.
- A scrotal swelling, in the case of a varicocele.
Because there is usually no outward sign, semen analysis is the only way to detect azoospermia.
How is azoospermia diagnosed?
A careful, stepwise evaluation establishes both the diagnosis and the type. These tests are available in-house — see our fertility diagnostics page for the male fertility panel.
Repeat semen analysis (with centrifugation)
The diagnosis must be confirmed on at least two properly collected semen analysis samples, with the laboratory spinning down (centrifuging) the sample to check for any sperm in the sediment. Occasionally, a few sperm are found this way, changing the picture.
Hormone testing (FSH, testosterone)
Blood levels of FSH and testosterone (and sometimes LH and prolactin) help distinguish obstructive from non-obstructive causes. A high FSH with small testicles points towards reduced production (NOA), while normal hormones with normal testicular size suggest a blockage (OA).
Scrotal and transrectal ultrasound
Imaging can identify a varicocele, absent vas deferens, or obstruction.
Genetic and karyotype testing
Where non-obstructive azoospermia is suspected, karyotyping and Y-chromosome microdeletion testing (and CFTR testing for suspected CBAVD) are recommended. Dr. Shweta Agarwal coordinates these with the couple.
What does azoospermia mean for fertility, and what are the options?
This is the most important — and most hopeful — part. Azoospermia frequently still has options. For many men, sperm can be retrieved directly from the reproductive tract or testicle and used to fertilise the partner's egg through ICSI, where a single sperm is injected into a single egg.
If the cause is obstructive (OA)
Because sperm production is normal, surgical sperm retrieval usually finds sperm. The retrieved sperm are then used with ICSI during the partner's IVF cycle. In some cases of a previous vasectomy, surgical reversal is an alternative the doctor may discuss.
If the cause is non-obstructive (NOA)
Even when production is impaired, sperm can still be found in the testicle in a meaningful proportion of men using a careful microsurgical retrieval (micro-TESE). Any sperm recovered are used with ICSI. Retrieved sperm can also be frozen for use across cycles. Whether retrieval is likely to succeed depends on the underlying cause, and Dr. Shweta Agarwal will give you a realistic picture for your situation.
If no sperm can be retrieved
In some men, particularly certain non-obstructive cases, no sperm are found despite a thorough search. In that situation, donor sperm is one established, legally regulated option that couples may choose to consider. This page provides educational information only; donor sperm in India is managed strictly through a licensed ART bank under the ART (Regulation) Act 2021 and ICMR guidelines, and the process is discussed in detail at a dedicated, confidential consultation. Adoption is another path some couples explore. There is no single right answer — only the one that is right for you.
Our in-house embryology laboratory, led by Aayush Agarwal, Ph.D., processes and cryopreserves retrieved sperm.
When should we see a specialist?
Please consider a confidential evaluation if:
- A semen analysis has reported no sperm (azoospermia) — even one such result warrants proper assessment.
- You have been trying to conceive for 12 months without success and male-factor testing has not yet been done.
- You have a history of undescended testicles, mumps after puberty, genital infection, prior vasectomy, or chemotherapy.
- You have noticed a scrotal swelling or symptoms of low testosterone.
Male fertility evaluation is straightforward and private. Aansh Hospital & IVF Center provides discreet consultations in Marathi, Hindi, and English.