Semen analysis is the most important test to assess a man’s fertility.
An assessment of whether a poor sperm count is the cause of infertility can only be made as the sum of several factors, including the quantity, quality and mobility of sperm. A low sperm count in the ejaculate is not to be equated with sterility. In this case, however, it may take longer for an egg to be successfully fertilized. Limited mobility or shape of the sperm can adversely affect natural conception.