SOCS1 and ovarian hyperstimulation syndrome: While IL-2 mRNA levels in PBMCs were significantly higher in the OHSS as compared to the control groups (2.449 ± 0.255 vs 1.043 ± 0.146; p < 0.01, respectively), SOCS-1 mRNA levels were non-significantly lower (0.541 ± 0.144 vs 1.171 ± 0.423; p = 0.22, respectively).