Varicocele and Fertility: Assessment and Treatment

What is a varicocele?

A varicocele is a collection of enlarged veins around a testicle, within the scrotum. Veins carry blood away; when flow is disrupted, blood can pool and the veins become more prominent. It is a finding about blood vessels, rather than a semen-test result or a diagnosis of infertility.

Some people notice an ache, heaviness or more visible veins when standing. Others have no symptoms and discover the finding during an examination or scan. A clinician needs to establish what a new swelling actually is: a cyst, fluid collection and other testicular conditions can feel similar to a person examining themselves.

Symptoms and when to seek urgent help

Arrange medical assessment for a new lump, a change in testicular shape or size, swelling or an ache that does not go away. Do not assume a swelling is a varicocele because you recognise a description online. The examination is useful for health even when you have no plans for children.

Go to A&E immediately or call 999 for sudden severe testicular pain, pain with sickness or abdominal pain, or testicular pain lasting more than an hour or continuing at rest. These symptoms need urgent assessment rather than waiting for a fertility appointment. A previously diagnosed varicocele does not explain away a new acute symptom.

Clinical examination and ultrasound answer different questions

A clinical varicocele is detected on examination. A subclinical varicocele is detected on imaging but cannot be felt on examination. These are different evidence groups when considering fertility treatment. A scan report containing the word varicocele does not establish that a procedure would be useful.

Ultrasound can help when the examination is uncertain or when the clinician needs to investigate another scrotal finding. Ask what the scan was requested to establish and how it fits the physical examination. A vein measurement alone should not become a personal pregnancy prediction.

Can a varicocele affect sperm or fertility?

A varicocele can be relevant to male fertility, but its presence does not prove it caused an abnormal semen result or difficulty conceiving. Assessment connects symptoms, examination, reproductive history and semen findings. Other contributors may still need attention.

The practical distinction is between finding an anatomical variation and identifying a treatment target. For somebody with reassuring semen findings and no symptoms, the conversation differs from that for someone with a palpable varicocele, reduced semen parameters and ongoing difficulty conceiving. Neither person should be given the other person’s treatment recommendation.

Where semen analysis fits

Semen analysis describes features of a sample, including number, movement and shape. Keep the complete report with its date and collection notes. An abnormal finding may need confirmation and male specialist review. A repeat decision should account for the original result, collection circumstances and clinical priorities.

A blood testosterone level cannot substitute for examining sperm in semen. Likewise, a scan cannot tell you the sample’s sperm count. If testing is relevant, agree which question it addresses and who will explain it. You can seek assessment before trying for pregnancy; the treatment evidence for infertility should not be presented as evidence that everyone planning ahead needs repair.

When is fertility treatment worth discussing?

NICE NG257 recommendation 1.28.1, published in March 2026, says to consider surgical or radiological treatment when a varicocele is found on clinical examination, semen parameters are reduced and the person is trying to conceive spontaneously. Relevant female fertility factors must also be considered. This is a discussion for a defined clinical situation, rather than an instruction to treat every varicocele.

The AUA/ASRM guidance also distinguishes a palpable finding from one detected only on imaging and advises against repair for the latter as an infertility intervention. Ask the specialist which evidence group describes you and whether pain or another health concern creates a separate reason to consider treatment.

A decision map for the appointment

Use this map to prepare a conversation, not to diagnose yourself or select a procedure. The clinician may identify another condition or a reason to change the order of assessment.

Sperm improvement, pregnancy and live birth are different outcomes

A change in a semen measurement describes the sample. Pregnancy and live birth involve additional people, processes and time. An anatomical repair can be technically successful while a family-building question remains unresolved. Ask which outcome an estimate refers to before using it to decide.

NICE’s evidence discussion found pregnancy benefit in a selected clinical-varicocele group, while live-birth evidence was sparse and mixed. WHO describes considerable uncertainty in comparisons between procedures. Those limitations belong in the decision beside the possible benefits; no personal success percentage can be inferred from the diagnosis alone.

Surgery and embolisation: what is being changed?

Surgery treats the affected veins through an operative approach; techniques differ. Embolisation is performed by an interventional radiologist using imaging to guide a catheter and block the abnormal vein, for example with coils. Both require a discussion about the reason for treatment, practical recovery and possible harms.

Ask about the proposed technique, anaesthetic, experience of the treating service, likelihood of persistence or recurrence, and what happens if the first approach cannot be completed. Availability and individual anatomy can affect the choice. A service’s preferred procedure is not automatically the best option for every patient.

Risks, consent and practical preparation

Embolisation can involve bruising, discomfort, contrast reactions, technical difficulty and, rarely, movement of a coil. Recurrence can happen after embolisation or surgery. Discuss the risks of the specific operation or radiological technique, including possible effects on the testicle, with the responsible specialist.

Follow your own department’s instructions about medicines, food, drink and transport. Hospital leaflets differ, so a generic online fasting rule may be wrong for your procedure. Tell the team about anticoagulants, contrast reactions and other medicines; do not change treatment independently. Ask whether you need an escort or someone to stay overnight.

Repair before IVF or ICSI needs a separate discussion

Evidence in people attempting spontaneous conception cannot automatically answer whether to delay IVF or ICSI. Ask the male-fertility specialist and treating clinic to coordinate the decision around both people’s findings, the intended route and the consequences of waiting.

A good plan explains what repair is intended to achieve, when it will be reviewed and what would lead to treatment proceeding. Do not assume that every sperm finding requires a procedure before assisted conception. Equally, a planned IVF cycle does not remove the value of assessing symptoms or a potentially relevant male-health finding.

Single people, future planning and LGBTQ+ routes

You do not need a partner, a female partner or an immediate pregnancy plan to ask about testicular health. Men have reproductive-health questions in their own right. People with testes who are trans or non-binary may also need assessment; preferred language, examination comfort, privacy and hormone history belong in the conversation.

For donor or surrogacy routes, explain who may provide sperm, eggs and carry the pregnancy. Treatment evidence from couples trying through intercourse may not directly apply to your intended route. A future-planning assessment can provide useful information without promising that preventive repair will protect fertility years later.

What should follow-up measure?

Before treatment, agree what will be reviewed: symptoms, clinical findings, relevant semen results and the next family-building decision. Retain a baseline report rather than relying on memory. Ask when follow-up should happen and who arranges it; use the treating service’s timetable.

A better second semen result does not by itself establish the full benefit of a procedure or prove a future pregnancy will follow. Persistent symptoms, an unexpected finding or difficulty conceiving may need reassessment. Lifestyle support can sit alongside care but cannot be assumed to remove an enlarged vein or replace indicated specialist treatment.

A short preparation note for your consultation

Write down when you first noticed the finding; whether it changes with standing or activity; any ache or swelling; previous testicular conditions or surgery; medicines and hormone use; semen results and collection dates; and your current goal. Bring the ultrasound report if one exists, including why it was requested.

Then identify the decision: understanding an incidental scan finding, managing symptoms, investigating reduced semen parameters or coordinating treatment. Ask what has been established, what remains uncertain, which options fit and who owns the next action. Request a chaperone, interpreter or adjustments for pain, disability or dysphoria where useful.

Related guidance and support

• Complete Guide to Semen Analysis
• Complete Guide to Male Fertility
• Preparing for a Repeat Semen Analysis
• Learn with Frank free

Related blog articles

• A varicocele on ultrasound: does it need treatment?

Frequently asked questions