This page lists birth control from most to least effective in actual use. Most methods may be more effective than shown here if used perfectly. These numbers are based on the clinical practice guidelines of The Society of Obstetricians and Gynaecologists of Canada (SOGC).
Implant
Over 99.9% effective
A small flexible rod inserted under the skin in the underarm that release a small amount of hormone.
about $350
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Vasectomy
99.8% effective
A minor procedure that prevents the release of sperm with ejaculation. This is a permanent method.
Cost is covered by MSP
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IUD (intrauterine device)
Over 99% effective
A flexible plastic T-shaped device with a string for removal.
$75-$400 depending on the type
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Tubal ligation
99.5% effective
Surgery to close the fallopian tubes to prevent sperm from reaching the eggs. This is a permanent method.
Cost is covered by MSP
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Combining methods
Usually over 95% effective
When more than one birth control method is used.
Cost varies
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Depo-Provera injection
94% effective
A progestin hormone injection.
$25-$45 every 3 months
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Birth control pills
91% effective
A daily pill containing combined hormones.
$15-$30 per month
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Evra patch
91% effective
A plastic sticker with progestin and estrogen.
$15-$30 per month
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NuvaRing
91% effective
A flexible plastic ring containing progestin and estrogen.
$15-$30 per month
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Progestin-only pills
91% effective
A daily pill containing only one hormone, called progesterone.
$15-$30 per month
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Male / external condoms
82% effective
A latex or non-latex covering that fits over an erect penis before intercourse.
$0.50-$2 per condom
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Female / internal condoms
79% effective
A soft nitrile pouch inserted into the vagina before intercourse.
$1.50-$2 per condom
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Withdrawal / pull-out method
78% effective
When the penis is taken out of the vagina before male ejaculation.
No immediate cost
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Fertility awareness/
rhythm
76% effective
Avoiding intercourse on the days of the menstrual cycle when a pregnancy is most likely to occur.
No immediate cost
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Spermicides
72% effective
A film, foam, gel, cream, suppository or sponge used during intercourse.
$15-20 for several uses
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No method
15% effective
When no birth control method is used.
No immediate cost
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