The cause of infertility may be difficult to determine but may include inadequate levels of certain hormones in both men and women, and trouble with ovulation in women.The main symptom is an inability to get pregnant. In many cases, there are no additional symptoms. Many treatments significantly improve the chances of getting pregnant. They include hormone treatments, fertility drugs and surgery. In addition, assisted reproduction uses various medical techniques to fertilise an egg. Infertility is a condition where you cannot get pregnant after one year of trying to conceive. In women, cause of infertility can include endometriosis, uterine fibroids and thyroid disease. Men with fertility problems may have a low sperm count or low testosterone. The risk of infertility increases as you age.