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.