Look at it this way, you have an 80%-90% success rate. I loved having one with no periods, but had to weigh the risks. I am a minority to the norm. and suffered for 6 years and didn't realize my issues were related until recently. Please keep a list of ANY changes you have after getting it. Good Luck. I really wish I could tolerate it, but for me, it's like an Evil Beast I want gone forever!!! I wish you normalcy... :}