The copper intrauterine device (IUD) is the older, original form of intrauterine contraceptive devices which is inserted into the uterus to prevent pregnancy. It consists of a polyethylene plastic T shaped frame with copper wire coiled around the stem and arms. It also has a plastic monofilament thread attached at the end of the stem which hangs from the cervix into the vagina and assists in placement and removal. The copper contained within the IUD is toxic to sperm and thus prevents fertilisation of the egg.
For more information on this form of contraception see Intrauterine Device (IUD)
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