FMR1 and fragile X syndrome: Notably, women with a personal history of isolated cognitive impairment, developmental delay, inexplicable ID, autism, elevated levels of the follicle-stimulating hormone after 40 years of age, idiopathic familial primary ovarian failure, isolated cerebellar ataxia accompanied with tremor, or FXS-related disorders are encouraged to have FMR1 prenatal testing [13].