<P> A child with chickenpox </P> <Li> <P> A child with chickenpox on her face . </P> </Li> <P> A child with chickenpox on her face . </P> <P> During pregnancy the dangers to the fetus associated with a primary VZV infection are greater in the first six months . In the third trimester, the mother is more likely to have severe symptoms . For pregnant women, antibodies produced as a result of immunization or previous infection are transferred via the placenta to the fetus . Varicella infection in pregnant women could lead to spread via the placenta and infection of the fetus . If infection occurs during the first 28 weeks of gestation, this can lead to fetal varicella syndrome (also known as congenital varicella syndrome). Effects on the fetus can range in severity from underdeveloped toes and fingers to severe anal and bladder malformation . Possible problems include: </P>

Where does the chicken pox virus come from