The distinct improvement rate and improvement rate of symptom ( lower abdomen pain , low back pain ) scores during menstruation days at 12 weeks after the first injection , the rates of lower abdomen pain were 73.9 % ( 34/46 ) , 15.2 % ( 7/46 ) respectively in the test group , 72.3 % ( 34/47 ) , 2.1 % ( 1/47 ) respectively in the control group , had statistically significant difference between the two groups ( P = 0.026 ) .