ABSTRACT DIFFERENCES IN THE RATIO OF ANO GENITAL DISTANCE (AGD) TO SECONDARY DYSMENORRHEA IN S1 STUDENTS OF THE FACULTY OF MEDICINE, RIAU UNIVERSITY By Dina Sartika Background: Secondary Dysmenorrhea was menstrual pain that lasts a long time and appears about 12 months after menarche with increasingly intense pain and was accompanied by pelvic pathology. The most common cause of secondary d…