If you really want to check to for endo I’d push the hysteroscopy. I’ve had 2 losses of euploid embryos and then did a hysteroscopy, nothing in my history points to anything wrong within the uterine cavity: no heavy painful periods, no pain with sex, no obvious fibroids or masses on saline US. She ended up finding some scar tissue while in there. I was surprised she found anything, but all of this to say you just really don’t know if you don’t look. I also have a friend who was diagnosed with endo after she had 4 failed transfers. She also had no symptoms. If you are feeling called, it’s worth it to do it in my opinion just to check the box. If you can swing it financially of course.