What is an intrauterine device (IUD) and how does it work?

An IUD is a small T shaped (or can be an inverse U shape) plastic device to which is joined either:

a copper wire wound around the central axis, which are the traditional copper IUDs and which vary in size and shape in order to best fit a woman’s anatomy or

a small  reservoir (this does not very in size) of the hormone progesterone (Levonorgesteral) which slowly diffuses the hormone locally in the uterine area.

The IUD is put into position during a scheduled medical consultation. It is generally a painless procedure and one that subsequently guarantees protection for 5 years or even more.

Once the IUD is in position a small inflammatory reaction of the mucous membrane in the uterus  results that:

• Inhibits survival of spermatozoids and ovocytes and so prevents fertilization,

• Inhibits potential embryo implantation.



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