Dr. Hidetaka Katabuchi, Professor and Chairman, Department of Obstetrics and Gynecology, Faculty of Life Sciences, Kumamoto UniversityDr. Takashi Ohba,Associate Professor,Department of Obstetrics and Gynecology,Faculty of Life Sciences, Kumamoto University Dr. Takeshi Motohara,Assistant Professor,Department of Obstetrics and Gynecology,Faculty of Life Sciences, Kumamoto University