Male fertility is tested through a semen analysis that measures sperm count, motility, and morphology, with follow-up blood work, physical exams, or genetic testing ordered if the initial results come back low. It's a straightforward, non-invasive process that gives your doctor hard data to work with.
You and your partner have been trying for a while. Maybe six months. Maybe a year. The question starts creeping in: is it me? Before your brain goes anywhere dark, know this—male fertility issues are common, and testing has gotten straightforward. Here's exactly what happens.
The starting point: a semen analysis
This is the foundational test. Everything else builds from it.
You'll provide a sample, typically through masturbation at the clinic or at home if you can get it to the lab within an hour. The lab looks at three main things:
- Sperm count—how many sperm are in your sample. The World Health Organization's current reference range is 15 million sperm per milliliter or higher. Below that, things get harder, though not impossible.
- Motility—how many sperm are actually swimming forward. You need at least 40% of sperm to be moving, with 32% or more showing progressive movement (swimming in a straight line or large circles, not just twitching in place).
- Morphology—what the sperm actually look like under a microscope. This one surprises most men. Only 4% of your sperm need to have normal shape for fertility to be considered normal. Sperm with two heads, coiled tails, or misshapen midsections are common and usually not a problem. The body produces plenty of imperfect sperm. The lab is looking for whether enough of them look right.
A single abnormal result does not mean you have a fertility problem. Sperm production fluctuates based on illness, stress, alcohol, sleep, and recent sauna use. Most labs will want a second sample taken two to four weeks later before drawing conclusions.
When the semen analysis shows something
If the numbers come back low, your doctor will usually order follow-up tests to figure out why.
Blood work looks at your hormones. Testosterone, LH (luteinizing hormone), FSH (follicle-stimulating hormone), and prolactin are the main ones. These tell the doctor whether your testicles are getting the right signals from your brain. If FSH is high and sperm count is low, it usually means the testicles themselves are struggling. If both FSH and LH are low, the problem may be in the pituitary gland.
A physical exam checks for varicoceles—enlarged veins in the scrotum that can raise testicular temperature and impair sperm production. Varicoceles are the most common reversible cause of male infertility, found in about 40% of men who have fertility issues. Your doctor can usually feel them during the exam, though an ultrasound may confirm it.
Genetic testing may come next. About 2% of infertile men have a genetic cause that can be identified. The most common is a Y-chromosome microdeletion—a small missing piece of genetic material on the Y chromosome that affects sperm production. Karyotyping checks for abnormalities in chromosome number or structure. This testing matters because it can affect treatment decisions and whether any potential issues could be passed to children.
Post-ejaculate urine analysis checks for retrograde ejaculation—a condition where semen goes backward into the bladder instead of out through the urethra. This is more common in men with diabetes, spinal cord injuries, or those who have had certain surgeries. If your sample volume is very low, your doctor may order this test.
What about at-home tests?
You can buy sperm count tests at the pharmacy. They measure concentration only—not motility or morphology. A normal result on an at-home test is reassuring but not definitive. An abnormal result means you need a proper lab analysis. Think of at-home tests as screening tools, not diagnostic ones.
Who should get tested first
If you and your partner have been trying for 12 months without success (or 6 months if she is over 35), both of you should see a reproductive specialist. The male gets tested first because a semen analysis is simple, non-invasive, and cheap compared to female fertility testing. It makes practical sense to rule out the easy test before moving to the more involved ones.
What the results actually mean for your options
This is where the conversation shifts from numbers to decisions.
If the semen analysis comes back normal, the focus stays on your partner's evaluation. About one-third of infertility cases involve male factors, one-third involve female factors, and one-third involve both or remain unexplained.
If sperm count is low but not zero, options range from lifestyle changes (improving sleep, managing stress, reducing heat exposure to the testicles) to medical treatments like IUI (intrauterine insemination) or IVF (in vitro fertilization) with ICSI (intracytoplasmic sperm injection), where a single sperm is injected directly into an egg.
If no sperm are found in the sample, it is called azoospermia. This requires further testing to determine whether the problem is production (the testicles are not making sperm) or blockage (sperm are being made but cannot get out). Surgical sperm retrieval is sometimes an option.
Your doctor should explain what each result means for your specific situation. If they do not, ask. Bring a list of questions. Write down the numbers. Male fertility testing produces hard data—you should understand what those numbers say.
One practical note
Do not have sex or masturbate for two to five days before providing a sample for analysis. Two days is the minimum. Five days is the maximum. Shorter abstinence periods tend to lower sperm count. Longer periods can reduce motility because older sperm accumulate. The sweet spot is three to four days.
If you are heading into testing, that is the first thing to get right. Everything else comes after.
Frequently asked questions
What is a normal sperm count on a semen analysis?
The World Health Organization's current reference range is 15 million sperm per milliliter or higher. Below that, conception becomes harder, though not impossible. A single low result doesn't confirm a fertility problem, since sperm production can fluctuate due to illness, stress, alcohol, sleep, and recent sauna use.
How long should I abstain before a sperm test?
You should avoid sex or masturbation for two to five days before providing a sample. Two days is the minimum and five days is the maximum. The sweet spot is three to four days, since shorter periods can lower sperm count and longer periods can reduce motility.
Are at-home sperm tests accurate?
At-home sperm tests measure concentration only and don't assess motility or morphology. A normal result is reassuring but not definitive, and an abnormal result means you need a proper lab analysis. They're best treated as screening tools rather than diagnostic ones.
What follow-up tests are done if a semen analysis is abnormal?
Your doctor will typically order blood work to check testosterone, LH, FSH, and prolactin levels, and a physical exam to look for varicoceles, which are the most common reversible cause of male infertility. Genetic testing or a post-ejaculate urine analysis may follow depending on what the initial results suggest.