Relationship Between Secondary Dysmenorrhea with the Menstrual Fluid Volume and the Menstrual Cycle in Undergraduate Medical Students of the University of Riau. ABSTRACT by Syafira Nadisa Background: Dysmenorrhea is defined as cramping pains in the lower abdomen. Secondary dysmenorrhea is divided into primary dysmenorrhea and secondary dysmenorrhea. Secondary dysmenorrhea is a menstrual…