IncidenceOne in ten complainants of menstrual disorders have Primary Amenorrhea A study in India indicated that 11.1% of adolescent girls, who presented with gynecological complaints of menstrual disorders, had Primary Amenorrhea. However, the incidence of the disease in women is less than 1%, in the United States. References:Balachander,G; Raghavan, G; Rajaram, SS (1993)J.Obstetrics and. Gynaecology of India, 43(4): 599-604 Published on Apr 01, 2008Last Updated on Apr 03, 2008