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A 47-year-old member asked:

What causes hormonal contraception to fail?

1 doctor answer5 doctors weighed in
Dr. Paula Hillard
Obstetrics & Gynecology 45 years experience
Nothing is 100%: The most common cause of failed hormonal contraception is related to user-error: missed pills, patch, ring, shot, etc, but even if you use a method perfectly, failures can happen. Next to permanent sterilization, the most effective methods include iuds and implants--which are "forgettable"--and not as subject to user-error, making them easy and very effective to use.
Last updated Dec 13, 2016

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