Characteristics of Male Infertility Male infertility refers to the inability of men to achieve fertility within a certain period of time. It is a serious problem for marriage and family in modern society. How to judge male infertility is a very important topic, which will be elaborated on from four aspects below. Semen Characteristics Semen is one of the important indicators of male fertility. If there are problems with semen quantity, quality, sperm motility, etc., it will affect male fertility. normal situation