When the semen analysis says zero or near-zero: azoospermia and varicocele workup

When a semen analysis comes back severely abnormal, especially when it shows no sperm at all (azoospermia), the temptation is to jump to ICSI or to a donor conversation. There is a workup that comes before that. Done properly, it tells you whether the problem is something that can be reversed, something that needs a surgical retrieval but allows you to use your own sperm, or something where donor sperm becomes the primary option. None of those conversations are short, but they are different conversations.

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   1. Hormone bloods (FSH, LH, testosterone, prolactin)

   Distinguishes obstructive azoospermia (sperm being made but not getting out, normal hormones) from non-obstructive azoospermia (sperm not being made well, usually high FSH, sometimes low testosterone). Different downstream pathways.

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   2. Physical examination by a urologist

   Checks testicular size, vas deferens presence (absent in CBAVD, often linked to cystic fibrosis carrier status), varicocele (enlarged scrotal veins). What gets felt determines what gets tested next.

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   3. Targeted genetic + imaging tests

   Karyotype (Klinefelter syndrome adds an X chromosome and is one of the commoner causes of severe oligospermia or azoospermia). Y chromosome microdeletion testing. Cystic fibrosis carrier screening if vas deferens is absent. Scrotal ultrasound to confirm varicocele or other structural causes.

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   4. If treatable cause found, treat it

   Hormonal causes (low gonadotropins) sometimes respond to medication. Varicocele repair improves semen quality in selected patients. Infections respond to antibiotics. Lifestyle factors reverse over one sperm cycle. Treatment buys time before more invasive routes.

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   5. If sperm not in ejaculate, surgical retrieval

   TESE or micro-TESE retrieves sperm from testicular tissue. Success rates 30 to 60 per cent depending on cause. Retrieved sperm goes straight to ICSI in a paired IVF cycle for the female partner.

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   6. If retrieval fails, donor or other paths

   Donor sperm or adoption become primary options. The conversation deserves space and is significantly different from the medical track that came before. See the donor gametes article for the legal and cultural angles.