Hi and welcome to Belly Belly.

I don't have a subseptate uterus, but I read up a bit about the physiology of the uterus when I found out that I have a retroverted uterus. From what I read, the subseptate uterus is when the two tubes that form the uterus as an embryo do not completely fuse and there is a section of "wall" (the septum) that remains and causes the heart-shape that is usually described for the subseptate uterus.

The length and size of the septum can vary greatly and usually the bigger it is the more problems it can cause. A septum can be so small that it causes no problems at all. A bigger septum can cause problems though. If the baby implants on a septum it unfortunately usually miscarries. If the septum is quite large it can cause premature labour because the uterus cannot stretch as much as usual. And the baby can often be breech because it can't turn as easily.

If you recently had your septum removed I would assume that it was big enough that the doctor thought that it might cause problems for you either conceiving, or carrying to full term. I'm not really sure whether the removal of the septum means that there should now be no problems associated with your subseptate uterus, but I really really hope so

I'm very sorry about your losses and I hope that you heal really quickly and that your continued TTC journey is a short one. Good luck!!!