Hypoxia/ischemia‐induced perinatal brain injury results in progressive damage to white matter in the developing brain.13, 41 To investigate whether HPC could attenuate H/I‐induced impairment on white matter integrity, SMI32 (red), a marker for nonphosphorylated axons, and MBP (green), a marker of mature myelin, were stained to visualize the development of axons and myelination, respectively, after H/I injury (Figure 2A). Here, MBP is linked to brain injury.