How Common is Male Infertility, and What Are Its Causes? How Common is Male Infertility, and What Are Its Causes? How Common is Male Infertility, and What are It’s Causes? How Common is Male Infertility, and What Are Its Causes? hormone imbalances or blockages of sperm movement How Common is Male Infertility, and What Are Its Causes? hormone imbalances or blockages of sperm movement