At-Home Semen Analysis: How It Works and How Accurate It Is

What a semen analysis measures

A semen analysis looks at the quality of a semen sample. The World Health Organization (WHO) publishes the laboratory manual most labs follow, now in its sixth edition (2021). A full report typically covers:

• Volume: how much semen the sample contains
• Concentration and total sperm number: how many sperm per milliliter and in the whole ejaculate
• Motility: the share of sperm that move, and the share that move forward (progressive motility)
• Vitality: the share of sperm that are alive
• Morphology: the share of sperm with a normal shape (normal forms)

A published review of the sixth edition reports the lower fifth percentile values from men in couples who conceived naturally within one year of unprotected intercourse: semen volume 1.4 mL, total sperm number 39 million per ejaculate, total motility 42%, progressive motility 30%, vitality 54% and normal forms 4%.

These are not pass or fail lines. The same review notes that the sixth edition moves away from fixed reference thresholds and states that the fifth percentile alone is not sufficient to diagnose male infertility. A result below one of these values is a reason for a clinician to look closer, not a diagnosis. Results are read together, with your history and your partner's results.

Semen analysis is part of a standard couples workup. The National Institutes of Health describes it as the way providers assess sperm health and quality, and notes that more than one sample may be needed because sperm production varies. See our guide to testing for couples and the male fertility test.

Types of at-home tests

Home tests fall into two broad groups that are easy to confuse.

The first is the screening test you read yourself. The FDA has cleared several of these for over-the-counter home use. SpermCheck Fertility (510(k) K100341), for example, is described in the FDA decision summary as a qualitative test that detects sperm concentration at or above 20 million sperm per milliliter, intended as an aid in determining a man's fertility status. You mix a sample with a solution and read a line, much like a home pregnancy test. The FDA also lists other cleared home sperm tests, such as the YO Home Sperm Test (K161493), under the product code for semen analysis devices.

The second group is the kit that collects the sample at home so that a laboratory can analyze it. Here the home part is the collection, not the measurement, and the report comes from a lab. Gala Fertility uses a kit of this kind: a semen analysis kit is sent to his home and the sample is analyzed as part of the program.

Which one is right depends on the question. A screening test can tell you quickly whether concentration is above one threshold. It cannot replace the fuller picture a laboratory report gives, which your clinician needs to plan next steps. For where this sits in the bigger picture, see how long to try before testing.

How accurate home tests are and their limits

The accuracy question has two parts: does the test do what it says, and is what it says enough?

On the first part, the FDA decision summary for SpermCheck Fertility reports that, in the manufacturer's precision testing on prepared semen dilutions, results agreed with the expected result in every case, and that its detection limit work supported the 20 million per milliliter cutoff. That is a laboratory performance finding on prepared samples, not a measure of how well the test predicts anyone's fertility.

On the second part, the limits are built into the design:

• It is qualitative. A line means concentration is at or above the cutoff. No line means it is below. It does not give a number.
• It measures concentration only, so it says nothing about motility, vitality or shape, and does not report volume or total count.
• The 20 million cutoff comes from an older WHO reference value that the FDA summary cites. The 2021 manual reports a total sperm number of 39 million per ejaculate as the lower fifth percentile, and no single concentration threshold decides fertility.
• A single sample is a snapshot. Sperm production varies, so one result, positive or negative, can mislead.

A positive result on a screening test does not mean fertility is normal, and a negative one does not mean he cannot father a child. Either way, if you have been trying for the time ASRM advises, a full evaluation is still the next step.

How to collect a sample

Follow the instructions in your kit first, because they are written for that test. A few points apply broadly:

• Abstinence: WHO recommends 2 to 7 days of ejaculatory abstinence before collecting a sample for diagnostic purposes. The NICHD mentions around 48 hours. Using the same window each time makes repeat results easier to compare.
• Use the container and steps provided in your kit, and follow its instructions on timing and handling.
• Collect the whole sample. If any is lost, say so on the form or to the lab.
• Tell the lab or your clinician about any recent fever, illness or medication.

Your kit's instructions override any general advice here.

When to repeat the test

Because sperm production varies from one sample to the next, the NICHD notes that more than one sample may be needed. In practice, an abnormal or borderline result is usually repeated, using the same abstinence window, before anyone draws conclusions.

ASRM advises at least one semen analysis at the onset of a couples evaluation. If that result is abnormal, a clinician will usually ask for another sample and may order follow-up tests.

If you used a home screening test and the result was below the cutoff, do not wait for a second home test to act. Share the result with a clinician and ask about a laboratory semen analysis.

What abnormal results can mean and next steps

An abnormal result describes the sample, not the cause. The WHO notes that male infertility is most commonly linked to problems in the ejection of semen, absent or low sperm levels, or abnormal sperm shape and movement. Finding out why takes more than one number.

The NICHD lists what a provider may add: a history and physical exam, blood hormone tests (testosterone, FSH, thyroid hormones, prolactin) and, in some cases, genetic testing when few or no sperm are found.

A referral to a reproductive urologist is the usual next step when a result points to something best handled in person. The American Urological Association notes that infertility is due in whole or in part to the male in approximately one-half of infertile couples, so a clear male-factor workup matters for the couple as a whole.

None of this means a pregnancy can be predicted or promised from one test. It means you know more about what to do next.

How semen analysis fits into couples testing at Gala

At Gala Fertility, testing covers both partners. After you complete one shared intake, his semen analysis is done with a kit sent home. His bloodwork is added if your clinician indicates it, and her bloodwork and pelvic ultrasound are done near you. Every result is reviewed and explained to you both in one video visit, and his results appear in your shared account.

Some semen results are best handled in person. If yours is one of them, your clinician refers you to a reproductive urologist or a fertility clinic and explains why. IUI, IVF and other in-person care after a referral are not part of the program. The program is for male-female couples who are both 18 or older, and it is not available in New York, New Jersey or Rhode Island. No outcome is promised.

You can read more on her side of the workup, on trying to conceive, or start your fertility intake together.

This article is general education, not medical advice. Talk to a clinician about your own results.

Sources

1. WHO. WHO laboratory manual for the examination and processing of human semen, 6th edition. 2021.
2. Boitrelle F, et al. The Sixth Edition of the WHO Manual for Human Semen Analysis: A Critical Review and SWOT Analysis. Life. 2021.
3. The Influence of Male Ejaculatory Abstinence Time on Pregnancy Rate, Live Birth Rate and DNA Fragmentation: A Systematic Review. 2023.
4. FDA. 510(k) substantial equivalence decision summary: SpermCheck Fertility (K100341). 2010.
5. FDA. 510(k) premarket notification database: YO Home Sperm Test (K161493).
6. NICHD, NIH. How do health care providers diagnose infertility?
7. World Health Organization. Infertility. Fact sheet.
8. American Urological Association. Male infertility guideline.
9. ASRM. Fertility evaluation of infertile women: a committee opinion. 2021.

This article is for general information and is not medical advice. Talk to a licensed provider about your own health.