97% to 98%: The "mini-pill" is a Progesterone only form of birth control, but it is just as effective as any of the combination (estrogen/progesterone) birth control pills. Generally the failure rate for oral contraceptives (any type) is in the range of 3%.
Answered 6/30/2014
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4 doctors weighed in across 2 answers
A doctor has provided 1 answer
2 doctors weighed in across 2 answers
A doctor has provided 1 answer
A doctor has provided 1 answer
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