Levonorgestrel
"Had my sonogram check up today at 2.5 weeks post insertion. The IUD was exactly where it should be. I told my doctor I had experienced some pretty intense pain/cramping on my right side near what I assumed was my ovary. He told me that was the implant "getting in place" and was pretty normal. I've never had painful periods so my experience for what is normal is fairly limited. And although the pain was at times intense & nauseating it was very quick. The cystic acne I reported on day 3 (see earlier review) has subsided and was explained as androgens flooding my system. Spotting is minimal and some bloody discharge when I urinate. No pain during sex or high intensity workouts. So far thee discomfort was worth it. :)"