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A 50-year-old member asked:

What happens if most birth control methods are around 99% effective, why aren't there a lot more unplanned pregnancies occurring?

1 doctor answer3 doctors weighed in
Dr. Eva Pickler
Specializes in Obstetrics and Gynecology
Unplanned pregnancy: Statistically, about 50% of pregnancies are unplanned. No birth control is 100% effective, so even with perfect use, some people get pregnant - and this includes after having tubes tied. Then there are the people who do not use it correctly, forget to use it, or just don't use birth control at all.
Dr. William Simon
Family Medicine 32 years experience
People also forget that there are medications that can lower the OC concentration and result in pregnancy, such as antibiotics. Also weight can affect the concentration of the hormone levels. Body fat can keep hormone levels at low end of effective dose making a person more vulnerable to changes from other meds.
Jul 27, 2014

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Last updated Oct 24, 2017

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