What is an IUD

IUD[ Intrauterine Device ]  The IUD can be a coil, loop, triangle, or T in shape made
of plastic or metal. An IUD is inserted into the uterus by a health-care professional.
IUDs are used to prevent pregnancy and are considered to be 99% effective.
It 
should be noted that IUD offer no protection against the acquired immune
deficiency syndrome (AIDSvirus or other sexually transmitted diseases (STDs).