It kind of is like it has never been pregnant, but it did have to stretch with the other, given it's like 1 uterus but split in the middle.
From what I understand the risk of preterm labour is high, but I want to know from people's personal experiences if they were more at risk with subsequents, or if they did go into preterm labour. I also had placenta previa last time and I have a 30% higher chance of having it again.

I've done plenty of research but google isn't personal and doesn't give you proper statistics with these things, personal experiences are much more useful.