Abstract
Ovarian hyperstimulation syndrome (OHSS) is a serious complication following controlled ovarian hyperstimulation (COH) for in vitro fertilization. OHSS has a range of clinical features from mild abdominal distention to severe thromboembolic events. Several clinical manifestations of OHSS such as ascites and hemoconcentration can be attributed to increased vascular permeability. Vascular endothelial growth factor (VEGF) and its receptor VEGFR2 have been identified as an important signaling system in mediating this increase. There is considerable genetic variation in the VEGF/R2 signaling system. We present the first study to examine if single nucleotide polymorphisms (SNPs) in the genes encoding the VEGF/R2 signaling system are associated with OHSS following COH. Blood samples from 53 OHSS patients and 100 controls were analyzed for six SNPs of interest. Odds ratios (OR) and 95% confidence intervals (95% CI) were estimated by a multivariate logistic regression model. We found an association between the VEGF +405cc genotype and OHSS (OR 3.4, 95% CI 1.01–11.7). This finding requires confirmation from other patient populations.
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