IGFBP2 and Primary amenorrhea: The 46,XX patient (patient 8), with primary amenorrhea, hypergonadotropic hypogonadism, normal female external genitalia and small uterus harbored gene variants involved in gonadal development and DSD (CUL4B, DAPK1, EMX2, FREM2, IGFBP2, MAML3, MYO7A, NOTCH1, PIK3R3, TGFBI, WNT9A and WNT9B; Table 2).