No association between the microsatellite polymorphism (TTTTA)n in the promoter of the CYP11A gene and ovarian hyperstimulation syndrome

Purpose :Women with ultrasonic evidence of polycystic ovaries are at higher risk of ovarian hyperstimulation syndrome (OHSS). We focused on investigating a possible association of the (TTTTA) (n) microsatellite polymorphism in the promoter of the CYP11A gene with OHSS during controlled ovarian hyperstimulation (COH). Methods :We evaluated 58 patients at high risk of OHSS (study group) and 58 control patients undergoing controlled ovarian hyperstimulation. Results :The difference in the allele distribution between both groups of patients was not statistically significant. The genotype distribution of 4+ (with at least one copy of the four-repeat-unit allele) and 4- (without the four-repeat-unit allele) genotypes was identical in the two groups. Conclusion :An association between the (TTTTA) (n) microsatellite polymorphism in the promoter of the CYP11A gene and the pathogenesis of OHSS could not be confirmed.