ACOG Practice Bulletin: Management of Infertility Caused by Ovulatory Dysfunction, Number 34, February 2002.
Katz V., G. Lentz, R. Lobo, D. Gershenson. Comprehensive Gynecology. 5th ed. Mosby Elsevier, 2007. Accessed on April 29, 2011 from http://www.mdconsult.com.
Schorge, J., J. Schaeffer, L. Hoalvorson, B. Hoffmen, K. Bradshaw, F. Cunningham. Williams Gynecology. 1st ed. The Mcgraw Hill Companies, Inc. 2008. Accessed April 29, 2011 from http://www.accessmedicine.com.