I have had implanon twice. The second time I had it removed after 6 months because I had periods all over the place. After it was removed my periods lasted 4 days and came every 20-24 days.

I wont get implanon again because I feel it has messed with my body too much. My sister and SIL both had theirs removed too for same reasons. Doesn't mean it doesn't work for everyone else.

BTW- in saying all of the above, both times I had the implanon I never got pregnant - so it worked in that regard.