Since It is a lifestyle endocrinological disorder, lifestyle interventions are the first treatment for PCOS.
A healthy calorie-restricted diet (30% calorie deficit or 1200-1500Kcal per day )and regular exercise /physical activity at least 5 days a week (for weight loss and prevention of future weight gain ) are the critical factors in improving insulin resistance and decreasing the BMI

Even a tiny amount of weight loss ( 5%) can restore ovulation and help in alleviating signs and symptoms of PCOS such as menstrual irregularity.