Maternal XX/X chromosome mosaicism in donor oocyte in vitro fertilization (IVF)

ObjectiveTo evaluate if the degree of maternal X chromosome mosaicism is correlated to the pregnancy loss rate in donor oocyte IVF in women with a Turner syndrome mosaic (TS-Mosaic) diagnosis.DesignProspective trial.Patients and methodsWomen with X chromosome Turner syndrome mosaicism and infertility were enrolled in a clinical trial. The rate of mosaicism was determined through florescence in situ hybridization (FISH) of 500 maternal lymphocytes. Following a detailed medical, including cardiac, evaluation, donor oocyte in vitro fertilization (IFV) was performed and pregnancy and pregnancy loss rates were observed.ResultsThe rates of maternal X chromosome mosaicism noted in the cycles from women with miscarriages (3%, 4%, 4%, and 6%) were not statistically different from cycles in TS-Mosaic women with normal deliveries (3% and 11%). These data suggest that the rate of maternal X chromosome mosaicism does not affect pregnancy loss rates in TS-Mosaic women undergoing donor oocyte IVF.