-Age: 20–39-Clinical diagnosis of POF, POI, or DOR-Early follicular phase FSH >15 IU/L-AMH <0.16 ng/ml or below the level of detection for the assay used-Undergoing ovarian biopsy by laparoscopy or clinically indicated abdominal surgery that provides access to the ovaries-Early follicular phase FSH >15 IU/L-AMH <0.16 ng/ml or below the level of detection for the assay used. Here, AMH is linked to premature menopause.