The distinct improvement rate and improvement rate of symptom ( lower abdomen pain , low back pain ) scores during menstruation days at @ weeks after the first injection , the rates of lower abdomen pain were @ % ( @/@ ) , @ % ( @/@ ) respectively in the test group , @ % ( @/@ ) , @ % ( @/@ ) respectively in the control group , had statistically significant difference between the two groups ( P = @ ) .