I used Implanon from August 2002 until August 2008 (2 rods for 3 years each). I had the rod removed as we were TTC and it took AF 10 weeks to reappear but that was once I had been diagnosed with PCOS and had commenced on metformin - the AF returned 2 weeks after I started the metformin.

My cycles were not regular because of the PCOS so it is difficult for me to say - also I got a BFP 5 months after having the Implanon removed (but only 2 cycles - long cycles because of the PCOS).

Hope that helps - any other questions - please let me know