A semen analysis is a laboratory test used to evaluate semen and sperm quality. According to Cleveland Clinic, it is commonly ordered as one of the first steps in fertility evaluation and is also used to confirm whether a vasectomy was successful. The test assesses key factors such as sperm count, motility, and morphology.
The page explains that semen is the fluid released during ejaculation and contains sperm along with other fluids, proteins, vitamins, and minerals that help support sperm function. During a semen analysis, a lab examines the sample under a microscope and may measure semen pH, volume, sperm concentration, sperm shape, sperm movement, time to liquefaction, vitality, and the presence of white blood cells.
For sample collection, Cleveland Clinic says masturbation into a sterile container is the preferred method. The sample may be collected at home or at a clinic, but if collected at home it should be brought to the lab within one hour and kept at room temperature. The page also notes that patients are often asked to avoid sexual activity for two to seven days before fertility testing to help produce the most accurate results.
The article notes that semen analysis results are usually available within a few days, and more than one test may be needed because sperm counts can vary from day to day. For fertility testing, the lab compares the sample to expected reference ranges. Cleveland Clinic lists normal ranges including semen volume of 1.5 to 7.6 mL, sperm concentration of 15 to 259 million per mL, motility of 40% to 81%, morphology of 4% to 48%, pH of 7.2 to 8.0, liquefaction time of 15 to 30 minutes, and vitality of 54% to 97%.
Cleveland Clinic also emphasizes that abnormal results do not by themselves prove infertility. Instead, they suggest a below-average chance of achieving pregnancy and often lead to additional testing, such as blood work or imaging, to look for hormonal issues, genetic causes, or physical blockages. The article also cautions that at-home sperm tests are less thorough than formal lab testing and may delay diagnosis or treatment.
