birth control
"I can'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's...completely worth it."