Nothing: All birth control have a failure rate. Nexplanon is very low. There is nothing that significantly effects it's failure rate. It is considered a LARC, meaning long-acting reversible contraceptive. It is highly effective birth control that you don't have to think about and lasts a long time. We are encouraging use of LARCs to reduce the incidence of unintended pregnancies.
Answered 11/3/2014
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