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Contraceptive phenomenon of IUD

State the contraceptive phenomenon of the IUD?

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The IUD or intrauterine devicerefers to the piece of plastic coated with the copper which is inserted in the uterus by the doctor. Copper is gradually released (IUD generally last 5 to 10 years) and as it has a spermicidal action the sperm cells are destroyed before fecundation takes place. In this mechanism, the movement of IUD within the uterus causes slight endometrial inflammation which helps to avoid nidation.

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