n the primary cause of infertility is a sperm disorder. a man may have no sperm or low sperm or there could be a problem with how the sperm is moving. for women the primary cause of infertility is an ovulation disorder. normally a woman ovulates every month usually around the middle of the menstrual cycle which averages 28 days. experts say that women with an ovulation disorder may not ovulate at all or they may ovulate irregularly. other common causes of infertility in women are a blockage of the fallopian tubes which prevents an egg from traveling to the uterus and hormonal defects that make the uterine lining unprepared for egg implantation or that keep a pregnancy from being maintained.
what are the main causes of infertility?