Etonogestrel
"I had my first implant inserted November 2011. The following three years were bliss for me as my periods were exactly the same as when I was on no contraception (not heavy nor light for around 5 days.) my weight and skin stayed the same and had no pregnancy scares.

Assured it was perfect for me, I got my second implant in November 2014 and it has been nothing but trouble! My periods are now heavy and irregular. Initially it was spotting but now I have had my period for two months straight with heavy bleeding and cramps. I'm seeing my doctor today to get answers. The only positive since my second implant is that I'm not pregnant (not that I've wanted to have sex due to the circumstances)"