Skip to Main Content

CONTRACEPTION

Favorite Table | Download (.pdf) | Print
PERCENTAGE OF WOMEN EXPERIENCING AN UNINTENDED PREGNANCY WITHIN THE FIRST YEAR OF TYPICAL USE AND THE FIRST YEAR OF PERFECT USE AND THE PERCENTAGE CONTINUING USE AT THE END OF THE FIRST YEAR: UNITED STATES
% of Women Experiencing an Unintended Pregnancy Within the First Year of Use
Method Typical Usea Perfect Useb Women Continuing Use at 1 Yc

Male sterilization

0.15

0.10

100

Female sterilization

0.5

0.5

100

Implanon

0.05

0.05

84

Intrauterine contraceptives

ParaGard (copper T)

0.8

0.6

78

Mirena (LNG-IUS)

0.2

0.2

80

Depo-Provera

3

0.3

56

NuvaRing

8

0.3

68

Evra patch

8

0.3

68

Combined pill and Progestin-only pill

8

0.3

68

Diaphragm

12

6

57

Condomh

Female (fc)

21

5

49

Male

15

2

53

Sponge

Parous women

24

20

Nulliparous women

16

9

Withdrawal

22

4

46

Fertility awareness-based methods

24

47

Standard Days methodf

5

Two-Day methodf

4

Ovulation methodf

3

Symptothermal methodf

0.4

Spermicidese

28

18

42

No methodd

85

85

Emergency Contraceptive Pills: Treatment with COCs initiated within 120 h after unprotected intercourse reduces the risk of pregnancy by at least 60%–75%.i Pregnancy rates are lower if initiated in first 12 h. Progestin-only EC reduces pregnancy risk by 89%.

Lactational Amenorrhea Method: LAM is a highly effective, temporary method of contraception.j

aAmong typical couples who initiate use of a method (not necessarily for the first time), the percentage who experience an accidental pregnancy during the first year if they do not stop use for any other reason. Estimates of the probability of pregnancy during the first year of typical use for spermicides, withdrawal, fertility awareness-based methods, the diaphragm, the male condom, the oral contraceptive pill, and Depo-Provera are taken from the 1995 National Survey of Family Growth corrected for underreporting of abortion; see the text for the derivation of estimates for the other methods.

bAmong couples who initiate use of a method (not necessarily for the first time) and who use it perfectly (both consistently and correctly), the percentage who experience an accidental pregnancy during the first year if they do not stop use for any other reason. See the text for the derivation of the estimate for each method.

cAmong couples attempting to avoid pregnancy, the percentage who continue to use a method for 1 y.

dThe percentages becoming pregnant in columns (2) and (3) are based on data from populations where contraception is not used and from women who cease using contraception in order to become pregnant. Among such populations, about 89% become pregnant within 1 y. This estimate was lowered slightly (to 85%) to represent the percentage who would become pregnant within 1 y among women now relying on reversible methods of contraception if they abandoned contraception altogether.

eFoams, creams, gels, vaginal suppositories, and vaginal film.

fThe Ovulation and Two-Day ...

Pop-up div Successfully Displayed

This div only appears when the trigger link is hovered over. Otherwise it is hidden from view.