The SP-10 Male Fertility Rapid Test Cassette is a rapid chromatographic immunoassay for in vitro qualitative detection of Acrosomal Protein SP-10 found on sperms to estimate of sperm concentration in human semen above or below 15 million/mL. Sperm concentration can be used for assistant diagnosis and curative effect observation of male infertility, and provide guidance for reproductive planning of the eligible couples.