Side effects	Effective	Percentage		IC_95%
HTA
Yes	4	1.25		0.40 - 3.39
No	316	98.75		96.61 - 99.60
Headaches
Yes	3	0.94		0.24 - 2.95
No	317	99.06		97.05 - 99.76
Pelvic pain
Yes	20	6.25		3.96 - 10.10
No	300	93.75		89.61 - 97.60
Breast pain
Yes	2	0.62		0.11 - 2.49
No	318	99.38		97.51 - 99.89
Pain at the insertion site
Yes	2	0.62		0.11 - 2.49
No	318	99.38		97.51 - 99.89
Amenorrhea
Yes	19	5.94		2.64 - 9.89
No	301	94.06		91.27 - 97.68
Acne
Yes	2	0.62		0.11 - 2.49
No	318	99.38		97.51 - 99.89
Hypermenorrhea
Yes	4	1.25		0.40 - 3.39
No	316	98.75		96.61 - 99.60
Hypomenorrhea
Yes	2	0.62		0.11 - 2.49
No	318	99.38		97.51 - 99.89
Weight gain
Yes	8	2.50		5.86 - 12.37
No	312	97.50		95.73 - 99.05
Hot flush
Yes	3	0.94		0.24 - 2.95
No	317	99.06		97.05 - 99.76
Others
Yes	3	0.94		0.24 - 2.95
No	317	99.06		97.05 - 99.76