We are blamed for infertility after mirena

http://www.time.com/time/magazine/article/0,9171,951492,00.html?promoid=googlep


Using narrow tubes, they inserted pebbles into the wombs of their camels to keep the animals from becoming pregnant during the long journeys. That crude but successful measure may have been the first intrauterine device (I.U.D.), a contraceptive now employed by some 50 million women round the world, including about 2 million in the U.S. Yet, as effective as the I.U.D. is, preventing pregnancy for years at a time with no special effort by the woman, it has lately become a center of controversy. Some patients and physicians believe that I.U.D.s have been prescribed indiscriminately, with little regard for the risk of infection in the reproductive system or the danger of causing infertility

The original camel pebble simply discouraged mating. Today's I.U.D.s are effective (up to 98%) for different reasons. Inserted into the uterus, they cause a minor inflammation of the uterine lining that prevents the fertilized egg from implanting in the uterine wall after its journey through the fallopian tube. Certain types of I.U.D.s also function by releasing copper or the hormone progesterone

Some doctors feel that the I.U.D.'s dangers are being exaggerated. They insist that pelvic infection, which now causes sterility in 80,000 women in the U.S. a year, is primarily linked to venereal disease and sexual activity with more than one partner