@inbook{1159961994, author={Alex Simon and Wendy Y. Chang and Alan H. DeCherney}, editor={DeCherney, Alan H. and Nathan, Lauren and Laufer, Neri and Roman, Ashley S.}, title={Amenorrhea}, booktitle={CURRENT Diagnosis & Treatment: Obstetrics & Gynecology, 12e}, publisher={McGraw-Hill Education}, address={New York, NY}, year={2019}, url={obgyn.mhmedical.com/content.aspx?aid=1159961994} }