Hypergonadotropic hypogonadism is usually caused by the impairment of the structure and function of the gonads, but there are cases caused by reduced stimulation by the follicle-stimulating hormone (FSH) as a result of abnormal variants of genes encoding the follicle-stimulating hormone or its receptor (FSHR). This evidence concerns the gene BRD2 and Hypergonadotropic hypogonadism.