Webyou may become pregnant as early as the first week after removal of the implant. If you do not want to get pregnant after removal of the nexplanon implant, you should start. Webfeb 12, 2018 · for people using the contraceptive implant, the chances of getting pregnant are less than 1%, providing the implant has been in place for less than three years. Webso it doesn’t state they got pregnant while having nexplanon but rather right before insertion (and their hcg wasn’t high enough yet to have a positive pregnancy test) or. Webif you get nexplanon during the first 5 days of your period, you’re protected from pregnancy right away. If you get the implant at any other time in your cycle, use some.