The Intra-Uterine Device
(I.U.D.)

The I.U.D. is a specially shaped piece of plastic that must be inserted into the uterus by a doctor. It may work in one or both of the following ways:

• immobilize the sperm
• change the lining of the uterus to prevent implantation of the fertilized egg.

Some I.U.D.s are covered with very fine copper wire, others contain a hormone that is slowly released. A doctor will select the one best suited for the patient.