Use of etonogestrel implant beyond approved duration: prolonged contraceptive effectiveness.

Background: The subdermal etonogestrel contraceptive implant has a current approved duration of 3 years. There is, however, recent and strong evidence of its effectiveness for 2 additional years during which no pregnancies were documented.

Case: We report a case of a 28-year-old woman who had an etonogestrel implant inserted 4 years earlier and wished to get pregnant.