So. I need help. I am 29 weeks pregnant. I have had hyperthyroidism starting two months ago. Last week we got an ultrasound that showed the baby has an enlarged thyroid. Today we got an ultrasound that showed the baby has mild ventriculomegaly. Normal the ventricals in the brain being whatever thru 10mm. Hers are 11mm. So this could be due to down syndrome, an infection, or nothing.... ? Has ANYONE dealt with this?!? I am so confused.