The genetic factor is one of the most prominent reasons for the elimination of embryos / fetuses, as well as the so-called. spontaneous abortions. Still many technical difficulties makes keeping so. pre-implantation diagnosis, gamete chromosomal level. Programs extracorporeal fertilization in vitro must be particularly careful supervision surrounded genetic. Raises the danger of increased incidence of genetic defects, depending on the age of the parents. Teratozoospermia appears to be a very complicated diagnostically difficult symptom to assess genetic and obtaining satisfactory therapeutic results.