What birth defects are common are common with congenital cytomegalovirus infections?

Retina damage. Damage to the retina from inflammation and scar tissue formation.
Varies. The intensity of fetal damage varies somewhat with the timing of the mother/baby infection. Earlier infections can cause stillbirth, brain damage, major organ swelling & affect vision. Late in pregnancy the infection may go unnoticed initially but lead to progressive hearing loss within months or years.
10 % Only 10% of infants born with CMV have symptoms. They include small birth weight, small head, seizures, jaundice, and liver or spleen enlargement.