L&R70707:An HSG is not meant to diagnose uterine abnormalities, a sonohysterogram does that, so if you haven't had that, I'd question an RE that jumps to an MRI.
You know, now that you mention that I think he did say something about doing an ultrasound or something before the MRI once he gets a look at the HSG pics (he said the MRI is only if we have to since they are so expensive) We were there for an hour and a half and I'm sure now that I only remember half of what he said. I wish I could have a recording of the whole appt or something so I could listen to it again and see what I've already forgotten. It was so much information to take in all at once.