Infertility may affect both women and men and comes from various causes affecting any part of the reproduction process. In females, these processes include hormone production, egg maturation and release, and embryo implanting in the uterus. In males, the reason for infertility can be low or abnormal sperm production/function or blockages that prevent the delivery of sperm. Other conditions like injuries, long-term health problems, and even lifestyle choices are also factors responsible for male infertility.