Most men with fertility problems have no obvious symptoms at all. Infertility is typically discovered only after a couple has been trying to conceive for 12 months without success. That said, there are physical signs, sexual symptoms, and lifestyle factors that can raise a red flag before you ever step into a clinic, and understanding them can help you decide whether it’s time to get tested.
Sexual Symptoms That Point to a Problem
The most direct clues involve what happens during sex. Difficulty maintaining an erection, a noticeably low sex drive, or trouble ejaculating can all signal hormonal imbalances that affect sperm production. These aren’t guaranteed signs of infertility, but they overlap heavily with the same conditions that reduce fertility.
One lesser-known sign is retrograde ejaculation, where semen travels backward into the bladder instead of out through the penis. The hallmarks are “dry” orgasms (very little or no fluid comes out) and cloudy urine afterward because it contains semen. This can result from diabetes, spinal injuries, or certain medications, and it directly prevents sperm from reaching a partner.
Physical Signs You Can Spot
A few visible or tactile changes in the body deserve attention:
- Testicle size or firmness. Small, soft testicles may indicate reduced sperm production. If one testicle is noticeably smaller than the other, that asymmetry can also be meaningful.
- A lump or “bag of worms” feeling in the scrotum. This describes a varicocele, which is a cluster of enlarged veins above the testicle. Varicoceles are one of the most common treatable causes of male infertility. A large one is visible; a smaller one you’d only notice by touch. They often cause a dull, aching pain that worsens with standing and improves when lying down.
- Breast tissue growth. Enlarged breast tissue in men (called gynecomastia) can signal a hormonal imbalance, particularly elevated estrogen relative to testosterone.
- Reduced facial or body hair. Thinning beard growth or a general decrease in body hair suggests low testosterone or another hormonal disruption affecting the systems that drive sperm production.
Hormonal and Genetic Red Flags
Hormones control nearly every step of sperm production. Problems can originate in the testicles themselves or in the brain’s signaling systems that tell the testicles to work. Low testosterone is the most recognized issue, but imbalances involving the thyroid or adrenal glands can also interfere with fertility. Symptoms of low testosterone include fatigue, reduced muscle mass, low libido, and mood changes.
Some genetic conditions cause infertility from birth. Klinefelter syndrome (an extra X chromosome) often leads to small testicles and low sperm counts. Kallmann syndrome is rarer but has distinctive markers: men with this condition typically experience delayed or absent puberty, meaning little facial hair growth and no voice deepening during the teenage years. A unique feature of Kallmann syndrome is a reduced or completely absent sense of smell. If a man never went through typical puberty and has always had a weak sense of smell, that combination is worth mentioning to a doctor.
Medical History That Matters
Certain things in a man’s past significantly raise the odds of fertility issues. Undescended testicles during childhood, even if surgically corrected, can affect sperm production later. A history of groin or testicular surgery, hernia repairs, or trauma to the area all carry risk. Previous chemotherapy or radiation therapy can damage sperm-producing cells, sometimes permanently.
Chronic infections, particularly sexually transmitted infections like chlamydia or gonorrhea, can cause scarring that blocks the tubes sperm travel through. Repeated urinary tract infections or prostatitis can also play a role. Even something as simple as a history of high, prolonged fevers can temporarily suppress sperm production for months afterward.
What At-Home Tests Can (and Can’t) Tell You
If you’re looking for a quick screening before committing to a doctor’s visit, at-home sperm test kits are widely available. They vary quite a bit in what they measure. Basic kits only confirm whether sperm is present in the semen. More advanced smartphone-based kits use your phone’s camera to record a magnified video of the sample, estimating sperm concentration (how many sperm per milliliter) and motility (whether they’re moving).
That’s useful as a first pass, but it’s only a fraction of what a clinical test reveals. A formal semen analysis performed in a lab measures your exact sperm concentration, the percentage of sperm that are alive, the percentage that are moving, the volume of your ejaculate, the acidity of your semen, and the size and shape of each sperm cell. Shape alone (morphology) is a major factor in whether sperm can successfully fertilize an egg, and no home kit currently evaluates it. Think of home kits as a screening tool: a normal result is somewhat reassuring, but an abnormal result, or persistent difficulty conceiving despite a “normal” home test, still calls for a full lab workup.
When to Get a Professional Evaluation
The standard guideline is that both partners should be evaluated after 12 months of regular, timed intercourse without a pregnancy. But you should move faster in certain situations: if the female partner is over 35, if there’s a known risk factor like a history of undescended testicles or cancer treatment, or if the couple simply wants answers sooner. Fertility specialists increasingly recommend that men get tested early in the process rather than waiting, since male factors contribute to roughly half of all infertility cases.
The initial evaluation is straightforward. It starts with a semen analysis, which requires providing a sample (usually at the clinic or at home with a short transport time). If results are abnormal, a doctor may order blood work to check hormone levels, a physical exam to look for varicoceles or structural issues, or genetic testing if the sperm count is very low. Ultrasound imaging can identify blockages or abnormalities that aren’t detectable by touch. Most of this can be completed within a few appointments, giving you a clear picture of what’s happening and whether it’s treatable.