Received May 28, 2013
Accepted May 24, 2013

Recently, the clinical use of the image of the meiotic spindle has been suggested as a possible resource to achieve the best embryos, higher rates of embryo implantation and pregnancy. The meiotic spindle controls the movements of chromosomes during the different phases of meiosis. The image of the meiotic spindle in oocytes “in vivo” by means of polarized light microscopy, allows embryologists make the morphological evaluation of the meiotic spindle as a non-invasive technique . Therefore this technique can be successfully used in choosing the best moment of ICSI. According to the authors, the results of this parameter are still controversial, so it is suggested to use with other techniques in order to achieve better clinical results.