There were no significant differences in age; infertility duration; cause of infertility; embryo transfer period; endometrial thickness on the day of embryo transfer; basal follicle-stimulating hormone (bFSH) dose; or free triiodothyronine (FT3), free thyroxine (FT4), and thyroid-stimulating hormone (TSH) concentrations between the two groups. This evidence concerns the gene FSHB and Infertility.