Etonogestrel
"I have had this implant in for a little over a year now and it was the worst descision I have made regarding birth control. After I had it put in, my body acted the same way before the implant. After about 3 months I had gained 10 pounds after not gaining any weight at all before the procedure. Now I have un predictable periods that can last from 3 days to 3 weeks with almost no break in between. There can be heavy bleeding at times or just some spotting. I waited to see if the side effects would become less of a problem over time like the doctor said but they have not so I will be getting Nexplanon removed."