Table 1c.

Probability estimates of side effects for contraceptive methods

Method	Amenorrhea	Venous thromboembolism	Urinary tract infections	Postoperative complications
LNG-20 IUS	0.2a [13]
Copper-T IUD
Implant	0.222 a
Injectable contraceptive	0.4 b[7]
Tubal ligation				0.012c[14]
Vasectomy				0.00043c[14]
Oral contraceptive	0.03[15]	0.00005[16]	0.15[17]
Transdermal patch	0.001[18]	0.00005 a[16]
Vaginal ring	0.03[19]	0.00005 a
Male condom
Female condom
Diaphragm			0.31[17,20]
Spermicides			0.31d[20,21]
Sponge
Fertility-awareness-based methods
Withdrawal
No method

IUD, intrauterine device; IUS, intrauterine system.

^aSource: Package Insert.

^bProbability of amenorrhea for 3-month injectable contraceptive increases each year to 0.7, 0.75, 0.78, and 0.8, respectively.

^cFirst year only.

^dAssumed to be the same as with the diaphragm.