The etiological agent, the varicella zoster virus (VZV), is spread by respiratory transmission or direct contact with infectious lesions. Seronegative persons are at high risk of primary infection manifest as varicella. According to a seroepidemiological study in Germany, the prevalence of VZV-specific IgG class an- tibodies in women of reproductive age is 96-97% and only 3-4% of women were found to be susceptible to varicella [1]. The average incidence of varicella in preg- nant women has been calculated as 0.7-3 per 1,000 pregnancies [2-4]. Information on a positive history of varicella correlates well with serological findings. However, VZV IgG can be detected in 85% of persons with negative history of varicella [5]. Although the clinical course of chickenpox is usually mild, varicella in pregnant women may occasionally lead to serious ma- ternal and fetal diseases