Most men with fertility problems have no obvious symptoms at all. The only definitive way to know is through a semen analysis, which measures sperm count, movement, and shape under a microscope. But there are physical signs, sexual function changes, and risk factors that can signal a problem before you ever get tested. About 15% of couples experience infertility, and roughly half the time, a male factor is involved.
Physical Signs Worth Paying Attention To
A few physical changes can hint at an underlying fertility issue. None of these confirm infertility on their own, but they’re worth noting:
- A lump, swelling, or pain in the testicle area. This could indicate a varicocele, which is a swelling of the veins that drain the testicle. Varicoceles are the most commonly identified correctable cause of male infertility, found in 35% to 50% of men with primary infertility.
- Small or soft testicles. Testicle size correlates with sperm production. Noticeably small or unusually soft testicles can reflect reduced function.
- Breast tissue growth. Abnormal breast enlargement (gynecomastia) can signal a hormonal imbalance that affects sperm production.
- Reduced facial or body hair. Thin or patchy body hair can indicate low testosterone or a chromosomal abnormality, both of which affect fertility.
Sexual Function Changes That May Signal a Problem
Difficulty in the bedroom isn’t just a sexual health concern. It can be a direct clue about fertility. Low sex drive, trouble getting or maintaining an erection, and difficulty with ejaculation are all associated with hormonal or structural problems that also impair sperm production or delivery.
Pay particular attention if you notice very small volumes of fluid when you ejaculate. This can indicate a blockage, a hormonal issue, or retrograde ejaculation, where semen flows backward into the bladder instead of out through the penis. Any of these reduces the number of sperm that actually reach a partner’s egg.
Risk Factors That Raise Your Chances
Even without symptoms, certain parts of your history put you at higher risk. A history of undescended testicles, groin surgery, or testicular injury can impair sperm production or block the tubes that carry sperm. Chronic health conditions like diabetes, infections (including sexually transmitted infections), and autoimmune disorders also play a role.
Lifestyle factors matter too. Heavy alcohol use, smoking, anabolic steroid use, and prolonged exposure to heat (like frequent hot tub use or occupational heat exposure) all reduce sperm quality. Certain medications, including testosterone replacement therapy, can suppress your body’s natural sperm production, sometimes dramatically. If you’ve been on any of these and are trying to conceive, that’s relevant information for a doctor.
When to Get Tested
The general guideline is straightforward: if your partner is under 35 and you haven’t conceived after 12 months of regular unprotected sex, it’s time to get evaluated. If your partner is 35 or older, that window shortens to 6 months. If you have any of the physical signs or sexual function changes described above, don’t wait for those timelines. Get checked sooner.
What a Fertility Evaluation Looks Like
The first step is usually a general physical exam and medical history. A doctor will examine your genitals and ask about inherited conditions, chronic health problems, injuries, surgeries, and medications. This visit alone can identify varicoceles, hormonal signs, or anatomical issues.
The core diagnostic test is a semen analysis. You’ll need to abstain from ejaculation for two to five days before providing a sample, which is then examined in a lab. The lab measures several things: how many sperm are present, how well they move, and whether they’re shaped normally. It also checks for signs of infection. The current reference standards from the World Health Organization set the lower limits at 16 million sperm per milliliter, with at least 30% showing forward movement and at least 4% having normal shape.
One sample isn’t enough to draw conclusions. Sperm counts naturally fluctuate, so doctors typically run several semen analyses over a period of time to get reliable results. If the numbers come back low or abnormal, further testing may include a scrotal ultrasound, hormone blood tests, genetic testing, or in some cases a testicular biopsy.
Are At-Home Sperm Tests Worth It?
At-home sperm test kits are widely available and can give you a quick read on your sperm count. They’re not inaccurate for what they measure, but what they measure is limited. Most home kits only tell you whether your sperm concentration is above or below a threshold. They can’t assess how well your sperm move, what shape they are, or whether there are signs of infection in your semen.
That’s a significant gap. You could have 100 million sperm but if none of them are moving, you won’t be fertile. A home test would show a “normal” result in that scenario. These kits can be a reasonable first look if you’re curious, but they don’t replace a full laboratory semen analysis. If you’re actively trying to conceive and concerned about your fertility, a lab test gives you the complete picture.
What Abnormal Results Actually Mean
A single low sperm count doesn’t necessarily mean you can’t have children. Fertility exists on a spectrum. Men with below-average counts conceive naturally all the time, and men with seemingly normal numbers sometimes struggle. The semen analysis identifies whether there’s a measurable problem, and if so, how severe it is.
If results are abnormal, the next step is figuring out why. Varicoceles, for instance, are often treatable with a minor surgical procedure, and sperm quality frequently improves afterward. Hormonal imbalances can sometimes be corrected with medication. Blockages may be surgically repairable. Even in cases where natural conception isn’t possible, assisted reproductive techniques can work with very low sperm counts. The key is getting the evaluation done so you know what you’re dealing with.