Dihydroartemisinin for Polycystic Ovary Syndrome

Inclusion Criteria: * Women with PCOS defined as having irregular menstrual cycles and hyperandrogenism. Irregular menstrual cycles are defined as \< 21 or \> 35 days or \< 8 cycles per year. Hyperandrogenism refers to either hyperandrogenemia or hirsutism. Hyperandrogenemia will be defined as an elevated total testosterone \>1.67 nmol/L measured by Elecsys Testosterone II (Roche Diagnostics). Hirsutism is determined by a modified Ferriman-Gallwey Score \>4 at screening exam. * Body Mass Index (BMI) between 18.5 and 28 kg/M2 * Negative pregnancy test * No plan for pregnancy in the coming 6 months Exclusion Criteria: * Patients on oral contraceptives. A two-month washout period will be required prior to screening for patients on these agents. A one-month washout will be required for patients on oral cyclic progestins. Patients on depo-progestins or hormonal implants are excluded. * Patients with liver disease defined as ALT or AST above normal range of each participating center, or total bilirubin\>30umol/L. Metabolic dysfunction-associated steatotic liver disease (MASLD) with normal ALT and AST can be included. * Patients with anemia (Hemoglobin \< 12 g/dL) or neutropenia (neutrocyte \<1.8×10\^9/L). * Patients with renal disease defined as serum creatinine\> 115umol/L. * Patients diagnosed with other endocrine diseases that are known to cause secondary polycystic ovary morphology, e.g., Cushing's syndrome, hyperprolactinemia, congenital adrenal hyperplasia (21-hydroxylase deficiency or other enzyme deficiency), hypothyroidism, etc. * Patients diagnosed with Type 1 or Type 2 diabetes. * Patients with known heart disease, like heart failure, atrial fibrillation, coronary heart disease, etc. * Patients with a history of any type of cancer. * Patients taking other medications known to affect reproductive function or metabolism. These medications include GnRH agonists and antagonists, antiandrogens, gonadotropins, GLP-1 receptor agonist, SGLT2i, metformin and thiazolidinediones. The washout period on all these medications will be two months. * Patients who have undergone a bariatric surgery procedure within the past 12 months.