[1] Hamamatsu Univ Sch Med, Dept Obstet & Gynecol, Hamamatsu, Shizuoka 4313192, Japan
[2] Hamamatsu Univ Sch Med, Dept Reprod Perinatol, Hamamatsu, Shizuoka 4313192, Japan
[3] Tesseikai Neurosurg Hosp, Dept Urol, Osaka, Japan
[4] Tawara IVF Clin, Med Off, Shizuoka, Japan