Just adding on to this with an anecdote. My mother had something called norplant (https://en.wikipedia.org/wiki/Levonorgestrel-releasing_impla..., it has been rebranded recently and there were class action lawsuits filed in the late 90s and early 00s due to awful side effects that were not listed) and had ovarian cysts later in life due to this device (she also had emotional problems while she was on them). It became completely debilitating to her health and required extremely invasive surgery to rectify (and prevent from ever coming back). It was actually shocking how much different she was after the surgery. The cysts can be extremely painful for up to a few weeks if they don't burst (her's didn't burst at ALL). She is more energetic after her surgery than I've ever seen her, despite being almost 50. Please be careful if you are gonna use these kinds of things and understand the risks (I know my mom's case is exceptional and not necessarily indicative of normal problems/use).