Copper ions releasing IUDs are more efficient than non-medicated methods. Why?

Mechanism of action of Cu releasing IUDs:



Copper releasing IUDs releases copper ions in the uterus where they suppress the motility of sperms so that they cannot swim and reach the fallopian tube for fertilisation. They also reduce the fertilising capacity of sperms. They increase phagocytosis of sperms within the uterus.

Advantage of copper ions releasing IUDs:

Advantages of copper ions releasing IUDs over non-medicated methods are as follows:

$\bullet$ Cu releasing IUDs can be used for a long time period and are the ideal contraceptives for spacing between the children.

$\bullet$ They have very few side effects.