The copper wire that is wrapped around the arms of the T kills the sperms on contact. However, though the exact working of the IUD is a mystery, it is a well known fact that copper is a metal that has been known to cause an inflammation in the walls of the uterus. This activates the white blood cells which attack the sperms taking them to be intruders to the system and kill them on contact.
In spite of the fact that this device works on cue without needing any intervention on the part of the woman and also that it has a better rate of effectiveness when compared to other methods of contraception, there are many factors that have worked against this device that has not just the better rate of success but also is very cost effective in the long run since it doesn’t need frequent refills or changes which is seen in other methods of contraceptives used by women.
Apart from the above features, there are other advantages that are related to the health of the woman using this contraceptive device. One of the most important advantages is that she doesn’t have to remember to repeat the same action at a specific time on a daily basis, like the pills. Secondly, it is proven to be safe to be used when she maybe using a tampon or even during sex. Another advantage is that neither she or nor her partner feel the string that hangs from the vagina and so don’t feel irritated during the actual act of indulging in sex.
And last but not the least, the copper IUD has been known to be totally harmless to the average woman unless she is allergic to copper. Thus, it can be seen that the IUD is the best options when it comes to contraception.