Very low: The range of first year failure rates of Depo range from 0% to 2.6%, depending on the study performed. Keep in mind, this doesn't protect you from acquiring STDs, so using a condom is always advisable.
Answered 7/20/2014
3.9k views
99%: It is 99% effective.
Answered 7/20/2014
3.9k views
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