Ladies: 8 Reasons for blood in your panties other than your period

It’s true: IUDs can lead to some irregular bleeding. Johnson says that about 25 percent of people who have ParaGard (the copper IUD) notice their periods get longer and heavier. Joy. As for the other kind of IUD, Mirena? Because it contains a small amount of levonorgestrel, a progestin hormone, it can cause random bleeding, too (at least for the first three to six months). The good news: Your typical period may get shorter and lighter. Oh, and if your IUD has moved or it’s not in the right place? Hello, blood on the undies—and you’ll probably experience discomfort, as well.