Scarlett was right to talk to her gynecologist. As happens with the progestin-only pill, even with the use of the subdermal implant, the menstrual cycle may vary both in terms of frequency (absent, less, more or continuous), intensity (reduced or increased) or duration. According to surveys conducted, the absence of bleeding (amenorrhea) was reported by about 1 in 5 women, and 1 in 5 women always report frequent or prolonged vaginal bleeding. The bleeding experienced during the first three months of implantation is considered fairly predictive of the future bleeding to be expected for each woman. Talk with your gynecologist too in order to get all the information you are looking for.