Objectives: This study was conducted to find out whether herbal medication during pregnancy causes any deformity in the unborn fetus. Methods: Thirty-five gynecological outpatients of KyungHee Univ. Oriental Hospital (1996. 10 - 1999. 2) who had taken herbal medication during pregnancy were questioned about duration of pregnancy at the moment, chief complaints, kinds of herbal medicine taken and its dosage and they were asked to answer the questionnaire over the phone about duration of pregnancy at the time of delivery, the newborn’s weights, delivery methods and the condition of deformity. Results and conclusions: The results of this experiment in which 35 pregnant women with the experience of herbal medication during pregnancy confirm that herbal medication during pregnancy does not cause any deformity to the newborn. It is thought that more studies through clinical follow-up and experiments are needed in the future.