Objectives: This study was performed to investigate the efficacy of Korean Medical Therapy (KMT) for patients undergoing In Vitro Fertilization (IVF). Methods: We analysed clinical data of 61 patients who visited for KMT after IVF from January 2013 to December 2013. Results: 1. Above 2years (63.9%) was the most prevalent duration of infertility. 2. The mean age of patients was 36.0 years old. The most prevalent age was 31~35 (45.9%) and 36~49 (27.9%) was next. 3. Anjonicheon-tang was the most prevalent KMT prescription, followed by Sutae-hwan, Jogyeongjongok-tang. 4. Twenty seven patients (44.3%) succeeded in pregnancy. And twenty patients (32.8%) succeeded in delivery. 5. The average duration of KMT was 73.8 days. Pregnancy success group was treated for 78.1 days, and pregnancy fail group was treated for 57.0 days. As a result, pregnancy success group was more treated than pregnancy fail group by 21.1 days in KMT. Conclusions: This study suggested that KMT affects improvement of the clinical pregnancy and delivery rate in IVF.