Objectives: Pregnant women could have various diseases, but the treatment of medication has the limitation that could cause fetal injury. So pregnant women have used complementary and alternative medicine in the world, but korean medicine had not been actively studied on obstetrics. This study is to investigate efficacy and safety of complementary and alternative medicine on obstetrics. Methods: We searched for papers which had pregnancy, obstetrics, complementary medicine, acupuncture and herb in the pubmed since 2000. Results: 41 papers were found. Acupuncture have the efficacy and safety on nausea, pelvic pain in pregnancy and breech presentation. Complementary alternative medicine had been studied as randomized controlled trial at various diseases in obstetric. But the method were without coordination, results were different from methods. So more clinical trials about complementary and alternative medicine would be needed. Massage and acupressure would be helpful for pregnant mood complaint. Conclusion: Complementary and alternative medicine has been proved as efficacy and safety in obstetrics, so complementary and alternative medicine would be helpful method in pregnant women. For making guidelines on complementary and alternative medicine treatment during pregnancy, more research will be needed.