Role of leutenising hormone LH and insulin resistance in polycystic ovarian syndrome

Abstract

Background: Polycystic ovary syndrome (PCOS) is the most frequent endocrine disorder seen in pre-menopausal women, affecting 5-10% of this population. It is characterized by menstrual irregularities and clinical hyperandrogenism such as hirsutism, seborrhoea and acne. PCOS women have insulin resistance, which results in compensatory hyperinsulinemia. A number of findings suggest that hyperinsulinemia may play a central role in the development of hyperandrogenism. This study is under taken to measure insulin resistance and leutenising hormone (LH) in PCOS patients and to see the relationship of insulin resistance with leutenising hormone (LH).Methods: Case control study was done taking 60 women PCOS and 60 age matched healthy women as controls. In all the subjects, concentrations of fasting plasma glucose estimated using enzymatic methods in semiautoanalyser. Fasting serum insulin and leutenising hormone (LH) measured by CLIA using Lumax-CLIA microplate reader. HOMA IR was calculated from estimated parameters.Results: The concentration of fasting serum insulin,fasting plasma glucose,HOMA –IR and leutenising hormone(LH) in controls are 9.33±3.08 µIU/ml,94.38±10.36mg/dl,12.16±0.67and 4.67±1.94 mIU/ml respectively; in PCOS cases they are 24.50±10.03µIU/ml,114.20±30.38 mg/dl,7.29±4.08 and 15.75±7.51 mIU/ml respectively. The mean concentrations of all the parameters were significantly (p value<0.05) increased in women with polycystic ovarian syndrome when compared with healthy women.Conclusions: This study shows that 75% of pcos women were insulin resistant and HOMA IR shows a positive correlation (r value 0.48, p<0.05) with serum leutenising hormone(LH).