Phenotype and Epidemiology of the Polycystic Ovary Syndrome (PCOS) in Colombia (PEP - Colombia) Study.

During the initial visit, a transvaginal or transabdominal pelvic ultrasonography will be performed in all participants, based on the sexual history and consent form by trained gynecologists who are part of study investigators. A transvaginal ultrasound is the accepted and validated method to assess the ovarian morphology in the study of patients with PCOS.

After an overnight fast of at least 6 hours (ideally), a 18 ml sample of venous blood will be collected from each study participant (i.e., the basal fasting sample). About 12 ml of the venous blood will be collected in plain tubes for serum cryopreservation and subsequent analysis, and the remainder in plain tubes for immediate glucose estimation in serum.