Suggested Readings and Key References Akgül S, Bonny AE Metabolic syndrome in adolescents with polycystic ovary syndrome: prevalence based on different diagnostic criteria J Pediatr Adolesc Gynecol 2019;32(4):383–387 American Academy of Pediatrics, Committee on Adolescence, American College of Obstetricians and Gynecologists and Committee on Adolescent Health Care Menstruation in girls and adolescents: using the menstrual cycle as a vital sign Pediatrics 2006;118:2245–2250 DiVasta AD, Emans SJ Androgen abnormalities in the adolescent girl In: Emans SJ, Laufer MR, Goldstein DP, eds Pediatric and Adolescent Gynecology , 6th ed Philadelphia, PA: Lippincott Williams & Wilkins; 2012:168–187 Fauser B, Tarlatzis B, Rebar R, et al Amsterdam ESHRE/ASRM-Sponsored 3rd PCOS Consensus Workshop Group (2012) Consensus on women’s health aspects of polycystic ovary syndrome (PCOS) Hum Reprod 27(1):14–24 Fraser IS, Critchley HO, Broder M, et al The FIGO recommendations on terminologies and definitions for normal and abnormal uterine bleeding Semin Reprod Med 2011;29(5):383–390 Hillard PJ Menstruation in adolescents: what’s normal, what’s not Ann N Y Acad Sci 2008;1135:29–35 O’Brien RF, Emans SJ Polycystic ovary syndrome in adolescents J Pediatr Adolesc Gynecol 2008;21:119–128 Paradise JE Evaluation of oligomenorrhea in adolescence UpToDate Version 17.2 http://www.uptodate.com Accessed October 13, 2009 The American College of Obstetricians and Gynecologists Practice bulletin: diagnosis of abnormal uterine bleeding in reproductive-aged women Obstet Gynecol 2012;120(1):197–206 Wiksten-Almstromer M, Hirschberg AL, Hagenfeldt K Prospective follow-up of menstrual disorders in adolescence and prognostic factors Acta Obstet Gynecol Scand 2008;87(11):1162–1168 Witchel SF, Oberfield S, Rosenfield RL, et al The diagnosis of polycystic ovary syndrome during adolescence Horm Res Paediatr 2015;83(6):376–389