The problem of infertility could arise from the woman, the man or both of them and sometimes it could stem from without a reason. The reasons of male infertility could be varicocele, idiopathic infertility, obstruction, undescended testis, immunological mechanisms, ejaculation disorder, testicular insufficiency, medicine-radiation effect, endocrine disorders such as diabetes, excessive consumption of alcohol, smoking and environmental toxins such as pesticides and lead. It is also believed that societies, obesity, lack of nutrition and ways of spending time for example excessive use of mobile phones, laptop computers and sauna, etc., as for women, age, smoking, excessive consumption of alcohol, having a skinny or overweight body and having been exposed to physical or emotional stress resulting in amenorrhea might be the causes of infertility. The increase in infertility prevalence draws attention to the effects of factors such as life style, nutritional habits and environmental factors. Male infertility emerges from mostly as a result of the relationship between oxidative stress and antioxidants, whereas, female infertility results from mostly as a result of insulin resistance and the effects of PCOS and BMI. Therefore, in this review, the relationship between nutrition and infertility which is commonly seen in men and women is studied.
