Question

the main reason for making copper t most effective and popular intrauterine device in female

Answer 1

it's life span it is effective for about 10 years or more and probability of pregnancy is almost 0 rest like every IUD it kills sperms at the level of cervix nothing special about it it hinders motility of sperms is asthenospermia

Answer 2

copper The is best and popular intrauterine device because it decreases sperm motility
kills the sperms at level of cervix