Fig. 2. A photomicrograph of a histological section of the hippocampus of a 15-day postnatal offspring of a pre-pregnancy normalweight mother. (A) The hippocampus proper comprised of two interlocking structures: C-shaped Cornu Ammonis (CA1-CA4 regions) continued as subiculum (S) and V-shaped Dentate Gyrus (DG), the molecular layer (M) inside the concavity of both CA and DG can be noticed. (B) CA1 region showing its three layers; Polymorphic layer (POL) containing lightly stained (lg) and deeply stained (dg) glial cells, Pyramidal cell layer (PCL) containing 5-6 compact layers of pyramidal cells with large rounded vesicular nuclei, and Molecular layer (ML) containing lightly stained glial cells. (C) CA3 region with few layers of large pyramidal cells (PCL), Polymorphic layer (POL) and Molecular layer (ML) show many lightly stained (lg) and deeply stained (dg) glial cells. (D) DG region shows its three layers; compact granular layer (GCL) with dark nuclei cells, Molecular layer (ML) contains deeply stained glial cells (dg), and Polymorphic layer (POL) with both lightly stained (lg) and deeply stained (dg) glial cells. H&E. Abbreviations; bc, blood capillary.