High levels of soluble vascular endothelial growth factor receptor 1/sFlt1 and low levels of vascular endothelial growth factor in follicular fluid on the day of oocyte retrieval correlate with ovarian hyperstimulation syndrom regardless of the stimulation protocol.

The aim of the study was to assess the predictive value of vascular endothelial growth factor (VEGF), its soluble receptor - sVEGF-R1/sFlt1 and endocrine gland-derived vascular endothelial growth factor (EG-VEGF) concentrations in serum and follicular fluid (FF) for ovarian hyperstimulation syndrome (OHSS) in women undergoing controlled ovarian hyperstimulation (COH) protocols. Patients have been divided into 3 groups: control group on natural cycle, patients stimulated with GnRH agonist and patients stimulated with GnRH antagonist. The FF and serum concentrations of VEGF, EG-VEGF, sVEGF R1 and the expression of VEGF and EG-VEGF mRNA in GC in small and large follicles collected from patients were investigated. When we compared all patients in a trial, OHSS occurrence was correlated with higher level of sVEGF R1 and a lower level of VEGF in a follicular fluid from large follicles in a day of oocyte retrieval. The VEGF/sVEGF-R1 ratio for patients in COH groups, above which the risk of developing OHSS is very low (OR 0.1 (95% CI 0.01 - 0.29, P = 0.0006) was found to be 0.281 pg/ml, with AUC - 0.738, P = 0.042, (95% CI 0.656 - 0.82). High levels of sVEGF-R1 and low level of VEGF in FF on the day of oocyte retrieval correlate with OHSS regardless of the stimulation protocol.

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