Menstrual Period, Late or Missed: References

Lentz G, Lobo RA, Gershenson D, Katz VL. Comprehensive Gynecology. 6th ed. Mosby Elsevier, 2013.

Hoffman B, Schorge JO, Bradshaw KD, et al. Williams Gynecology. 3rd ed. The McGraw Hill Companies, Inc. 2016.

ACOG Committee Opinion: Adolescents and Long-Acting Reversible Contraception: Implants and Intrauterine Devices, Number 539, October 2012. Replaces Number 392, December 2007. Reaffirmed 2014.

ACOG Practice Bulletin: Long-Acting Reversible Contraception: Implants and Intrauterine Devices, Number 121, July 2011. Replaces Number 59, January 2005. Reaffirmed 2015.

ACOG Practice Bulletin: Management of Abnormal Uterine Bleeding Associated with Ovulatory Dysfunction, Number 136, July 2013. Replaces Practice Bulletin Number 14, March 2000. Reaffirmed 2015.

Welt CK, Barbieri RL, et al. Evaluation and management of secondary amenorrhea. UpToDate. http://www.uptodate.com/contents/evaluation-and-management-of-secondary-amenorrhea. Literature review June 2016. Updated January 2016. Accessed July 21, 2016.

Welt CK, Barbieri RL, et al. Epidemiology and causes of secondary amenorrhea. UpToDate. http://www.uptodate.com/contents/epidemiology-and-causes-of-secondary-amenorrhea?source=related_link. Literature review June 2016. Updated January 2016. Accessed July 21, 2016.