of folliculogenesis-related genes, including factor in the germline alpha [FIGLA] , growth differentiation factor-9 [GDF-9] , follicle-stimulating hormone receptor [FSHR] , and KIT LIGAND after vitrification/warming of human ovarian tissue. Human ovarian tissue samples were collected from five transsexual women. In the laboratory, the ovarian medullary part was removed by a surgical blade, and the cortical tissue was cut into small pieces. Some pieces were vitrified and warmed and the others were considered as non-vitrified group [control] . Follicular normality was assessed with morphological observation by a light microscope, and the expression of FIGLA, KIT LIGAND, GDF- 9, and FSHR genes was examined using real-time RT-PCR in both the vitrified and non-vitrified groups. Overall, 85% of the follicles preserved their normal morphologic feature after warming. The percentage of normal follicles and the expression of FIGLA, KIT LIGAND, GDF-9, and FSHR genes were similar in both vitrified and non-vitrified groups [P > 0.05] . Vitrification/warming of human ovarian tissue had no remarkable effect on the expression of folliculogenesis-related genes