Polycystic ovary syndrome (PCOS), the common female endocrine disorder has multiple clinical manifestations with little known etiology. Genetics is said to be one of the factors contributing to this syndrome. It is generally the association of obesity with multiple ovarian cysts that leads to infertility, though differential insulin sensitivity, abnormal steroid hormone metabolism and adipocytokine secretion are also some of the causes. In the present study, we had compared Lipid profile and BMI levels as well as Steroid hormone Levels in obese & non obese PCOS patients. The body mass index in PCOS was higher with mean 25.36 and 23.19 in control subjects. The mean waist circumference was higher in control subjects with 86.76 and 77.97 in control women. Significant difference between PCOS and controls were observed in T3 and TSH levels. Mean T 4 levels were more or less similar in PCOS and controls subjects with 8.68 and 8.57 respectively. Significant difference was observed in mean values of sex hormone binding globulin (SHBG), dehydroepiandrosterone sulphate (DHEAS), vitamin D, calcium, estradiol, follicle stimulating hormone (FSH) and luteinizing hormone (LH) levels. Poly cystic ovarian syndrome is a common heterogenous, disease characterized by multiple hormonal imbalances in reproductive age. It is generally the association of obesity with multiple ovarian cysts that leads to infertility. Moreover, it is also associated with differential insulin sensitivity, abnormal steroid hormone metabolism.