Thanks for posting that! I was going to ask the forum myself, so you and the others have answered my question :)
Yup I had the same experience. It just disappeared completely for my 72 weeks and then one month after I stopped treatment there it was back again. I was hoping it was gone for good but it wasn't. Now even though I should probably be done with it it's like clockwork.......
So enjoy your 'free time' while you can! it's not that uncommon really but in my case I had terrible anemia so it was probably a lucky thing anyways!
I was past that part of my life when I started treatment so have no personal experience to share with you, however, I do recall reading other posts from women here who had a change in their monthly cycle while on the treatment meds. Some had complete absence of it while on treatment. Maybe someone who had personal experience with it here will chime in.