Presentation of the FBA results, indicating white matter pathways, showing increased fiber-bundle cross-section in the TAU group, compared to the CBT group at p < 0.01 uncorrected, in children aged approximately six years, in a longitudinal study built on a pilot Randomized Controlled Trial comparing Cognitive Behavioral Therapy (CBT, n = 8) and Treatment as Usual (TAU, n = 8) for maternal antenatal depression. To enable the visualization of the fixels in 3D, streamlines from the template-derived whole-brain tractogram were ‘cropped’ to include streamline points that correspond to fixels, and colored by direction (red: Left-right, blue: Inferior-superior, green: Anterior-posterior).