Research suggests that oral herpes simplex virus may be transmitted through the placenta to the fetus.
Most infections go unnoticed, but in some cases it could cause gingivostomatitis (inflammation of tissues in the mouth) in the baby and mother. More seriously, it could also lead to the encephalitis (inflammation of the brain). If your gingivostomatitis is severe, your dentist or doctor may consider treating you with an antiviral even before you have delivered.
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