As far as we know, and we’ve been doing this a long time, our periods stay the same. I did menstrual extraction just about every month for several years. When I wasn’t doing it every month, my same old period came back. I didn’t keep very good track of my periods, so I was surprised to find that I had spotted my dress, then I took notice and found that my periods came every three weeks or so, and then started and stopped over a week’s time. To me it seems like I was always on my period. That pattern did not change. Other women in our group and in other groups told us the same, and we never heard of anyone who experienced any change. No one has ever really studied this, of course.