Purpose: This study was designed to establish safety and efficacy of using herbal medicine during pregnancy. Methods : We searched through 23 sources, which had been previously published frome 1988 to 2007, concerned patients that used herbal medicine during pregnancy. We searched diseases for that used herbal medicine, kinds of herbal medicine taken, the period of herbal medicine taken, the duration of herbal medicine taken and results of herbal medicine taken. Results: 1. Whaltae(habitual abortion) was the most of diseases that used herbal medicine during pregnancy. Second disease was hyperemesis gravidum. Third disease was Taegibulan (fetal restlessness). 2. The most of Herb medicines of used for Whaltae was Kyoesamultang and Anjeonecheontang. The most of Herb medicines of used for hyperemesis gravidum was Bosaengtang. The most of Herb medicines of used for Taegibulan was Kyoesamultang. 3. The time of herbal medicine taken mostly was the first period of pregnancy. The rate was 78%. 4. The duration of herbal medicine taken mostly was $18.58{pm}14.24day$ at mean. 5. The rate of normal delivery was 85% and herbal medication during pregnancy does not cause any deformity to the newborn and of patients used herbal medicine. 6. The patients of taken herbal medicines were recovered from their symptoms and prevented miscarriage. The rate of recovery was 87%. Conclusion: The results of this study show that herbal medication during pregnancy is effective to cure disease and maintain the pregnancy. It is thought that have to actively try to treat diseases and symptoms on pregnancy by using herbal medicine.