Menstrual Cramps: 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 Frequently Asked Questions. Dysmenorrhea: painful periods. FAQ 046. January 2015.