Diagnosis of PCOS PCOS diagnosis involves assessing medical history, conducting a physical exam, blood tests for hormone levels (including testosterone, LH, FSH), and checking for insulin resistance. An ultrasound may be performed to identify ovarian cysts or follicles. Diagnosis generally requires meeting criteria that involve irregular menstrual cycles or absence of ovulation, signs of excess androgens, and ultrasound evidence of polycystic ovaries, according to established medical criteria like the Rotterdam criteria. It's essential to consult a healthcare provider specializing in reproductive health or endocrinology for accurate evaluation and diagnosis, as it involves ruling out other conditions with similar symptoms.