Etonogestrel
"This birth control is amazing. I had Implanon inserted while I was on my period and it actually stopped the next day. I haven't had one since. I've experienced some minor spotting, but it's nothing to cry over. I've had no mood swings or weight gain. The only down side I've experienced has been some nausea (particularly in the morning). It typically goes away after an hour or so though. I would most certainly recommend this form of birth control."