According to the Rotterdam criteria, how many criteria must be present to diagnose PCOS?

The Rotterdam criteria for diagnosing Polycystic Ovary Syndrome (PCOS) stipulate that at least two out of three specific criteria must be met. These criteria include the presence of oligomenorrhea or anovulation, clinical or biochemical signs of hyperandrogenism, and the presence of polycystic ovaries on ultrasound. The requirement for at least two criteria is designed to ensure that the diagnosis of PCOS is accurate and comprehensive, acknowledging the diverse manifestations of the syndrome. This approach also helps differentiate PCOS from other conditions that may present with similar symptoms and allows for a more standardized method of diagnosis.