Gene expression for both P14 and P28 mGluR5+/+ and mGluR5+/- pups are depicted for: (A) NCAN (n = 3 P14 mGluR5+/+, n = 3 P14 mGLuR5+/-, n = 5 P28 mGluR5+/+, n = 6 P28 mGluR5+/-); (B) MMP9 (n = 4 P14 mGluR5+/+, n = 4 P14 mGLuR5+/-, n = 6 P28 mGluR5+/+, n = 6 P28 mGluR5+/-); (C) TNR (n = 4 P14 mGluR5+/+, n = 3 P14 mGLuR5+/-, n = 6 P28 mGluR5+/+, n = 6 P28 mGluR5+/-); (D) ACAN (n=4 P14 mGluR5+/+, n = 3 P14 mGLuR5+/-, n = 6 P28 mGluR5+/+, n = 6 P28 mGluR5+/-); and (E) HAPLN1 (n=4 P14 mGluR5+/+, n = 4 P14 mGLuR5+/-, n = 6 P28 mGluR5+/+, n = 6 P28 mGluR5+/-). All gene expression results are normalized to mGluR5+/+ pups. Blue represents mGluR5+/+, and red represents mGluR5+/−. * p < 0.05, ** p < 0.01, **** p < 0.0001.