Infertility is defined as not being able to get pregnant despite having frequent, unprotected sex for at least a year for most couples. Infertility may result from an issue with either of the partner, or a combination of factors that prevent pregnancy. The main symptom of infertility is not getting pregnant. There may be no other obvious symptoms. Sometimes, a woman with infertility may have irregular or absent menstrual periods. In some cases, a man with infertility may have some signs of hormonal problems, such as changes in hair growth or sexual function. There is effective treatment in Siddha medicine after careful assessment of the Nadi, three dosham, Thega nilai and Dietary Habits.