Herpes and pregnancy
May 10th, 2008 | by admin | How can herpes simplex spread to an infant?
• If a woman with genital herpes has virus present in the birth canal during delivery, herpes simplex can be spread to an infant, causing neonatal herpes.
• Herpes can also be spread to the baby in the first weeks of life if he or she is kissed by someone with an active cold sore (oral herpes). In rare instances, herpes may be spread by touch, if someone touches an active cold sore and then immediately touches the baby.
However, there are precautions that can be taken to lower the risk of transmission from mother to baby.
How many babies get neonatal herpes?
Less than 0.1% of babies born in the United States each year get neonatal herpes. By contrast, some 25-30% of pregnant women have genital herpes. This means that most women with genital herpes give birth to healthy babies.
Which babies are most at risk?
Babies are most at risk for neonatal herpes if the mother contracts genital herpes late in pregnancy. This is because a newly infected mother does not have antibodies against the virus, so there is no natural protection for the baby during birth. In addition, a new herpes infection is frequently active, so there is an increased possibility the virus will be present in the birth canal during delivery.
What about pregnant women who have a history of genital herpes?
Women who acquire genital herpes before they become pregnant have a very low risk of transmitting the virus to their babies. This is because their immune systems make antibodies that are temporarily passed to the baby through the placenta. Even if herpes is active in the birth canal during delivery, the antibodies help protect the baby. In addition, if a mother knows she has genital herpes, her doctor or midwife can take steps to protect the baby.
How can herpes harm a baby?
Neonatal herpes can cause an overwhelming infection resulting in lasting damage to the central nervous system, mental retardation, or death. Medication, if given early, may help prevent or reduce lasting damage, but even with antiviral medication, this infection has serious consequences for most infected infants.
