J Reprod Infert arij001 Journal of Reproduction & Infertility 2228-5482 2251-676X Avicenna Research Institute jri444 Letter to Editor AlizadehLeilaDepartment of Epidemiology and Reproductive Health, Reproductive Medicine Research Center, Rouyan Institute, ACECR, Tehran, IranOmani SamaniRezaDepartment of Epidemiology and Reproductive Health, Reproductive Medicine Research Center, Rouyan Institute, ACECR, Tehran, Iran 11 4 325 327 9 9 2010 17 11 2010