The contraceptive implant’s pearl index is 0 to 0.08 – this means that out of 10,000 women who have had sex for 1 year, a total of 0 to 8 of them fell pregnant. Thus, like with any other contraceptive, there is a little chance of an unwanted pregnancy, but it is very unlikely – The contraceptive implant is one of the safest contraception methods for women.