They are plastic T-shaped devices about the size of a quarter ... “As the sperm nears the uterus, the copper causes it to change direction and swim away from the uterus,” said Gersh.

Copper IUDs are small, T-shaped devices inserted into your uterus to prevent pregnancy. The only available copper IUD in the United States is called Paragard. Copper IUDs prevent sperm from ...

An intrauterine device (IUD) is a small, T-shaped device that’s placed inside the uterus to prevent pregnancy. These devices, ...