How Does the Copper IUD Work?

The IUD (IntraUterine Device) is pretty cool — a small T-shaped device that's inserted (by your doc) into the uterus. The copper IUD has copper wiring and collars around the T-shaped frame and it does not contain any hormones. It works by affecting the motility and viability in sperm i.e. it creates an inhospitable environment for the sperm.