Is infertility just a woman's problem? No, infertility is not always a woman's problem. In about one-third of cases, infertility is due to the woman (female factors). In another third of cases, infertility is due to the man (male factors). The remaining cases are caused by a mixture of male and female factors or by unknown factors. What causes infertility in men? Infertility in men is most often caused by: Problems making sperm -- producing too few sperm or none at all Problems with the sperm's ability to reach the egg and fertilize it -- abnormal sperm shape or structure prevent it from moving correctly Sometimes a man is born with the problems that affect his sperm. Other times problems start later in life due to illness or injury. For example, cystic fibrosis often causes infertility in men. What increases a man's risk of infertility? The number and quality of a man's sperm can be affected by his overall health and lifestyle. Some things that may reduce sperm number and/or quality include: Alcohol Drugs Environmental toxins, including pesticides and lead Smoking cigarettes Health problems Medicines Radiation treatment and chemotherapy for cancer Age .You can consult with the consultant in Ashwini Hospital and Fertility Centre Moondrumavadi Madurai Tamilnadu