How is male infertility diagnosed?

The basic test for male infertility is a semen analysis (spermiogram), which determines the number and quality of sperm in the ejaculate. The result of the semen analysis is considered normal if the ejaculate meets the following conditions:

• At least 15 million sperm/ml
• At least 40% of sperm are motile
• Total volume is at least 1.5 ml