Infertility is when you cannot get pregnant after having unprotected, regular sex for six months to one year, depending on your age. The main symptom of infertility is not getting pregnant. Infertility is a common problem of about 10% of women aged 15 to 44. Infertility can be due to the woman (33%), the man (33%) and by both sexes or due to unknown problems (33%), approximately. Infertility in men can be due to varicocele, low or absent sperm count, sperm damage or certain diseases. Risk factors for men's infertility include alcohol and drug use, toxins, smoking, age, health problems, medicines, radiation, and chemotherapy. Risk factors for women's infertility include ovulation problems, blocked fallopian tubes, uterine problems, uterine fibroids, age, stress, poor diet, athletic training, and those risk factors listed for men.