Table 2.

Percentage of failure of the main contraceptive methods and percentage of women continuing the method at 1 year.

Adapted from (Trussell 2007) [29]

Method	% of women experiencing an unintended pregnancy within the first year of use		% of women continuing use at 1 year
	Typical use	Perfect use
No method	85	85	–
Non-pharmacological methods
Female condom	21	5	41
Withdrawal	20	4	46
Diaphragm	17	16	57
Ovulation method	23	3
Male condom	13	2	43
Copper IUD	0.8	0.6	78
Pharmacological methods
COCs and POPs	7	0.3	67
Patch	7	0.3	67
Vaginal ring	7	0.3	67
Injectable	4	0.2	56
LNG-IUD	0.1–0.2	0.1–0.2	80
Implant	0.1	0.1	89
Surgical methods
Tubal occlusion	0.5	0.5	100
Vasectomy	0.15	0.1	100

IUD intrauterine device, COC combined oral contraceptive, POP progestin-only pill, LNG-IUD levonorgestrel intrauterine device