Looking for long term affects of fetal CMV in children?

Varies considerably. This can have a small impact or lead to abortion and major organ damage. The earlier in pregnancy a mother has it, the more likely it will be devastating. If it happens near the end, there may be isolated progressive hearing loss & other issues but the kid usually is otherwise normal.
Deafness, neurologic. 10% of affected fetuses are symptomatic at birth: small size for gestational age, hepatosplenomegaly, petechiae and purpura of the skin, and jaundice at birth. >2/3 of the newborns with symptomatic congenital CMV infection will have neurologic involvement, including microcephaly, seizures, abnormal neurologic examination, and feeding difficulties. Most have progressive deafness (sensorineural).