Background: Fragile X syndrome (FXS) is the most common genetic cause of autism and intellectual disability. Fragile X mental retardation gene (Fmr1) knock-out (KO) mice display core deficits of FXS. including abnormally increased sound-evoked responses. and show a delayed development of parvalbumin (PV) cells. https://herbsdailyes.shop/product-category/baby-toothbrushes/