Blood test for male infertility could be on the horizon: AI can screen men with 74% accuracy - with no semen needed

Although the terms are often confused or used interchangeably, sperm and semen are not the same thing. Semen is the fluid that comes out of the penis, while sperm are the microscopic cells within the semen. Sperm cells are specialized for the task of fertilizing an egg. Semen analysis is considered essential for diagnosis of male infertility, but is not readily available at medical institutions other than those specializing in infertility treatment. 'Fertility specialists take it for granted that the first step in diagnosing male infertility is to perform a semen analysis,' Professor Kobayashi added.