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Varicocele and Male Infertility: The Connection Most Men Don’t Know About
When couples struggle to conceive, the conversation tends to center on the woman first. That’s a pattern worth changing. Male factors contribute to roughly half of all infertility cases, and one of the most common — and most treatable — underlying causes is a varicocele. At Lazare Urology, Dr. Lazare performs microscopic varicocelectomy for men whose fertility has been affected by this condition, often with results that allow couples to conceive naturally.
Most men who have a varicocele don’t know it. That’s not an exaggeration.
What a Varicocele Is and Why It Affects Fertility
A varicocele is an enlargement of the veins within the scrotum, similar to varicose veins in the legs. These dilated veins develop when the valves inside them stop functioning properly, causing blood to pool rather than drain efficiently. The result is elevated scrotal temperature — and that matters because sperm production is highly sensitive to heat. The testes need to be slightly cooler than core body temperature to produce healthy sperm. When that temperature rises consistently, sperm count, motility, and morphology all tend to decline.
Varicoceles are found in about 15% of the general male population. Among men being evaluated for infertility, that number climbs to roughly 40%. Among men with secondary infertility — those who fathered a child previously but are now struggling — the prevalence approaches 80% in some studies.
The Symptoms Are Subtle, and That’s the Problem
Most varicoceles produce no obvious symptoms. Some men notice a dull ache or a sense of heaviness on the left side of the scrotum — varicoceles are more common on the left due to the drainage angle of the left testicular vein — particularly after prolonged standing or physical exertion. Others notice nothing at all until a semen analysis comes back abnormal.
That’s how most varicoceles are discovered. Not through pain, but through a fertility workup. A urologist can typically detect a clinically significant varicocele during a physical exam, and a scrotal ultrasound can confirm it and assess blood flow patterns.
How Lazare Urology Approaches Treatment
Not every varicocele requires intervention. Small varicoceles with no measurable impact on semen parameters may simply be monitored. When treatment is indicated — particularly in men with abnormal semen analysis and a palpable varicocele — the procedure of choice is microscopic varicocelectomy.
Dr. Lazare performs microscopic varicocelectomy using a high-powered surgical microscope, which allows for precise identification and ligation of the dilated veins while preserving the testicular artery and lymphatic vessels. That level of precision is significant. Accidental damage to the testicular artery can compromise testicular function, and preserving the lymphatics reduces the risk of post-operative swelling and fluid accumulation.
The procedure is performed under sedation in the in-office operating room and takes about an hour. Most men return to light activity within a few days and can resume full activity within two weeks.
What the Research Shows About Fertility Outcomes
Improvement in semen parameters — sperm count, motility, and morphology — generally becomes measurable within three to six months after surgery. That timeline reflects the natural sperm production cycle, which takes roughly 72 days from start to finish.
Studies consistently show that varicocelectomy improves semen quality in the majority of men who undergo the procedure. Natural conception rates following microscopic varicocelectomy range from roughly 30 to 50 percent within one to two years, depending on how long infertility has been present and whether female factors are also involved. For couples pursuing assisted reproduction, improved sperm quality after varicocelectomy can also increase the success rates of IUI or IVF meaningfully.
There’s a long-term dimension worth mentioning too. Some younger men with varicoceles show signs of progressive testicular atrophy over time. Early treatment may help preserve testicular function well beyond the immediate question of fertility.
Getting the Right Evaluation at Lazare Urology
If you and your partner have been trying to conceive without success for six months or more, or if a semen analysis has returned abnormal results, a urology evaluation is a logical next step. A physical exam and ultrasound can determine whether a varicocele is present and whether it’s likely contributing to the problem.
At Lazare Urology in Brooklyn, New York, Dr. Lazare approaches male infertility with the same thoroughness applied to every urological condition — starting with an accurate diagnosis before recommending any course of treatment. If a varicocele is affecting your fertility, there’s a real, well-studied solution available. The first step is simply knowing whether you have one.
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