Objective: To investigate the incidence of chromosomal aberration in men and women in an intracytoplasmic sperm injection (ICSI) program for severe male infertility as well as in conceptuses resulting from these ICSI treatments.
Study Design: We evaluated chromosomal analysis, outcome of ICSI and the conceptuses resulting from treatment of 301 couples included in ICSI program.
Results: Cytogenetic evaluation demonstrated structural anomalies in 11 cases (3.6%), 9 men (2.9%) and 2 women (0.7%), all consisting of balanced chromosomal translocations. There were no significant differences in the rates of developed embryos (44.2% versus 40.1%) in couples with abnormal (n = 11) and normal (n = 290) chromosomal analysis. Embryo transfer led to a similar number of newborns (15.3% versus 12.4%) per transferred embryos, without any correlation with parents' chromosomes. In 63 fetuses conceived from couples without chromosomal abnormalities, we observed one fetus affected by Patau syndrome (47,XY, + 13). Two of four (50%) fetuses conceived by couples with male balanced chromosomal defects were carriers of the chromosomal translocation inherited from their fathers. The two fetuses resulted in the birth of two infants observed to be normal at the 12-month pediatric follow-up.
Conclusion: The offer of this treatment to infertile couples with male factor infertility should be accompanied by proper information regarding the genetic risks of this treatment. ICSI remains a good therapeutic option for infertile patients, but prenatal diagnosis is mandatory because of the potential increased aneusomic risk for the offspring conceived.
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