In a large
randomized study, patients with dysmenorrhea who received
acupuncture treatment, 15 sessions for a total duration of 3
months, showed lower average pain scores compared to a control
group. The authors found that improvements seen after completion
of 3-month therapy continued for at least another 3 months
[20]. Another study compared the effects of acupuncture to control
group in women with primary dysmenorrhea.