Background: Menstrual disturbance is the major complain in reproductive age women, the clinical and biochemical characteristics of women with different menstrual disturbance had not been well-understood. Objective: To study the clinical and biochemical characteristics of women with oligomenorrhea, amenorrhea, and premature ovarian failure. Method: Retrospective study, medical records reviewed in patients who visited to outpatient clinic of Reproductive Medicine in Taipei Medical University - Wan Fang Hospital form 2009 Jan. 1 to 2011 Nov. 31. Including criteria: Patients had sufficient medical records (anthropometric, endocrine, metabolic, lipid parameters) and age less than 45. Excluding criteria: (1) Women who experienced menarche <3 years before the beginning of the study; (2) Women who received hormones or drugs for major medical diseases; (3) Women who presented ovarian cysts or ovarian tumors, uterine abnormality; (4) Women who were >45 years old.