Semen Analysis: MedlinePlus Medical Test

What is a semen analysis?

A semen analysis, also called a sperm count, measures the quantity and quality of semen and sperm. Semen is the thick, white fluid released from the penis during sexual climax (orgasm). This release is called ejaculation. Semen contains sperm, the cells made in the male reproductive system that include the genetic material needed to make a baby.

If you and your partner haven’t been able to get pregnant, a problem with semen or sperm may be one of the reasons. Problems such as a low sperm count or sperm that don’t move properly can cause infertility, which is the inability to conceive a baby after a year of trying. A semen analysis can help figure out if a problem with semen or sperm is likely to be causing infertility.

Other names: sperm count, sperm analysis, semen testing, male fertility test