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Contraceptive Failure Rates

How often does a birth control method fail? The number's higher than you might think.
How effective is your current birth control method? Run a check with our contraceptive effectiveness chart and compare the failure rates for the different types of contraception.

Contraceptive effectiveness is characterized by typical use and perfect use (see chart below):

"Perfect failure rate" denotes the percentage of pregnancies which occur with the perfect and consistent use of the contraceptive method. The "typical failure rate", which takes into account some human error, is the actual percentage of pregnancies reported by average users.

FAILURE RATES
birth control method perfect use % typical use %
No Contraception 85 85
Spermicides 18 27
Male Condoms 2 15
Female Condoms 5 21
Diaphragm 6 18
Cervical Cap
without prior pregnancy
9 16
Cervical Cap
with prior pregnancy
26 32
Ovulation Method 3 22
Sympto-Thermal
(Basal Body Temperature)
2.5 16
Calendar (Rhythm) Method 5 13-20
Withdrawal 4 27
Oral Contraceptives 0.3 8
Ortho Evra Patch 0.3 8
IUD (Coil) 0.1 1.2
Female Sterilisation (Ligation) 0.5 0.5
Male Sterilisation (Vasectomy) 0.1 0.1
Abstinence 0 0

For added protection against pregnancy, you can use more than one method of contraception at a time, such as using condoms together with spermicides.

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