Approximately one in every six people of reproductive age worldwide experience infertility in their lifetime (WHO, 2018) [1]. In general, infertility is defined as not being able to get pregnant (conceive) after one year (or longer) of unprotected sex .Obesity is always a risk factor for infertility. Abnormal or excessive fat accumulation that presents a risk to health. A body mass index (BMI) over 25 is considered overweight, and over 30 is obese. The quantity and distribution of body fat affect the menstrual cycle through a range of hormonal mechanisms. The more excess weight and the more abdominal fat, the greater the risk of fertility difficulties. Insulin resistance, which occurs when the body must produce more insulin to maintain normal blood sugar levels, and decreased levels of sex hormone-binding globulin (SHBG), a protein involved in the regulation of the sex hormones androgen and oestrogen, are both associated with excess weight, particularly excess abdominal fat. Even if the information about obesity and fertility may seem overwhelming, there is also some positive news. Weight-loss programmes, especially those that involve both nutrition and exercise, can encourage normal menstrual cycles and increase the likelihood of getting pregnant. Even a little weight decrease of 5–10% can enhance fertility in obese women with an ovulatory infertility and increase their chances of getting pregnant.

Keywords: Infertility Obesity; Ovulation; BMI; Pregnancy