This is a comprehensive spatiotemporal atlas detailing the development of white matter tracts. It includes a separate atlas for each gestational week between 23 and 36 weeks of gestation. For each gestational age, the atlas includes (1) The Diffusion tensor image, (2) A set of 60 distinct white matter tracts, including commissural, projection, and association fibers. This atlas can serve as a unique and useful resource for neuroscience research and clinical practice, improving our understanding of the fetal brain and potentially aiding in the early diagnosis of neurodevelopmental disorders. It had been constructed from a population of 59 fetuses.