Thanks for your query.
I will try my best to provide you with best possible professional recommendations to your questions.
In terms of effectiveness in preventing pregnancy
is one of the most effective forms of birth control currently available. The failure rate for Implanon is about 0.0449%. Unlike other birth control methods, there is no differential for perfect use versus typical use, as no user action is required after insertion. Most cases of failure are due to incorrect insertion or insertion during pregnancy.
It is effective for period of 3 years.
I advice you to consult the doctor who had inserted it and get it removed.
Yet again, I do hope that you have found something helpful and I will be glad to answer any further query.