Hi, Please don t worry.The scan shows mild ventriculomegaly on right. But its less than 14 mm ,so there should not be any effect on your baby. You will need follow up scan after 4 weeks to see if it stays the same or increases in size.This variations of normal can be seen in 3 in 100 pregnancies, and inmost no cause is identified.Only if it is associated witrh other abnormal findings we need to worry. Recent herpes in neck indicates a secondary infection of herpes.Primary infections are the ones that can damage to the fetus.So, in all likelihood this scan finding is not due to herpes. You could get a Ig G,IgM,of herpes as a confirmation to show if it has affected the fetus. Hope this helps.