Etonogestrel
"I had my implant inserted in December 2014 and am now seriously considering having it removed after less than a year. The first 3 months were okay, only 2 regular periods with occasional light spotting in between.  Well, that ended in a big ole hurry.  I now have constant, heavy spotting (including during my wedding in April, yes it was so much fun to make my maid of honor hold my dress while I REPEATEDLY changed my tampon, AT. MY. WEDDING.) and my cystic bacne is out of control. I've now been on my period for almost 2 straight months, and needless to say I'm sick of it.  I've also gained 15ish pounds.  We don't want kids yet so it's great that it works for pregnancy prevention, but I'm not sure it's worth all the extra side effects."