"i can&#039;t take oral hormones due to migraines.  i have also never had children.  had the copper iud inserted when i was 25.  had no problems with it.  switched to mirena after 5 years.  my periods are always between 28 and 32 days.  i did not have any troubles with insertion and only took advil before the appointment.  i have had no weight gain, no negative effects at all.  i did not have any coverage and have spent over $1000 on iud&#039;s...completely worth it."