Hello everyone- this is my first post on here! I am pregnant with twin girls and have been blessed…

Hello everyone- this is my first post on here! I am pregnant with twin girls and have been blessed to have had a wonderful pregnancy so far. I had an ultrasound today and doctor told me Baby Girl B has an Umbilical Vein Varix and I'm wondering if anyone has any experience with this? There isn't too much out there in research and what there is is extreme and I don't want to be overly worried. Any help would be muchly appreciated!