Semen Analysis: Prep & Collection

Get a result you can trust. How to prepare for, give, and repeat a semen and sperm sample.

A semen analysis is the main test of male fertility, and it is easy to do. But the result only means something if the sample is collected the right way. A few simple steps before and during the test help make sure the numbers reflect you — not a bad sample.

Before the test

Wait the right amount of time

2–7 days without ejaculating before you give the sample.

This window matters. Less than 2 days can lower the volume and count. More than 7 days can raise the count but lower how well the sperm move. Aim for somewhere in the middle, and try to use a similar gap each time so your results can be compared.

Giving the sample

How it is collected

The sample is given by hand (masturbation) into a clean, sterile container the lab provides.
It is best to give the sample at the lab or clinic. If you collect it at home, keep it close to body temperature and get it to the lab within about 1 hour.
Catch the whole sample. The first part holds the most sperm, so if any is spilled, tell the lab — it can change the result.
Do not use regular lubricants, saliva, or an ordinary condom, as these can harm sperm. Ask the lab what to use if you need help.

What can throw off a result

A single low or odd result is often the sample, not your true fertility. Common reasons a test reads worse than it should:

A fever or illness in the last 2–3 months
Waiting too short or too long before the test
Spilling part of the sample
A long delay or cold temperature getting it to the lab
Lubricants, saliva, or the wrong container

This is exactly why one test is rarely the final word.

Why one test is never enough

After your result

If it is normal — that is reassuring. If you and your partner are still not conceiving, both partners should keep being evaluated together.

If it is abnormal — repeat the test in 2–3 months. If it is still off, a urologist or fertility specialist can look for causes, some of which are reversible.

Bring your report to the interpreter below to see which numbers are in range and what they mean.

Talk to your clinician, urologist, or fertility specialist about any concern. This guide is general education and does not give medical advice or replace your own care team.

Interpret my results → Should I get tested? Take the screener →

Evidence & references →

Evidence & References

The standards behind this guide.

1.World Health Organization. WHO Laboratory Manual for the Examination and Processing of Human Semen. 6th ed. Geneva: World Health Organization; 2021. The international standard for how a semen sample is collected and examined, including the 2–7 day abstinence window and reference limits.

2.Practice Committee of the American Society for Reproductive Medicine. Diagnostic evaluation of the infertile male: a committee opinion. Fertil Steril. 2015;103(3):e18–e25. ASRM guidance on evaluating the male partner — confirming abnormal results with a repeat analysis and when to refer to a specialist. A male factor is the sole cause in about 20% of infertile couples and contributes in another 30–40%.

Verify clinical decisions with your own clinician. Numbers and timing above trace to the sources listed here.