Classifying copper IUDs ... as drugs is a stretch ... told me that this is his greatest frustration. Mona Lisa N.V., a company that makes several popular IUDs in Europe, has the same problem.

When you get an IUD, it’s normal to feel cramping. “Your uterus is a muscle, and when you place something inside of it, the muscle responds by tightening,” says Lisa Holloway, a nurse ...