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How well fetal brain structures communicate with each other (or structural connectivity) changes rapidly during the second-to-third trimester of pregnancy, but little is known about how distinct structural connectivity networks (SCNs) develop in utero. Shown is diffusion magnetic resonance imaging data from in utero human fetuses. Cortical connectivity was strengthened with gestational age, showing a posterior-to-anterior and medial-to-lateral developmental order. Notably, the bilateral medial orbital part of the superior frontal gyrus, the anterior and middle cingulate gyrus, and the right calcarine and middle occipital gyrus displayed the most significant increases in connectivity. See the article by Ruike Chen et al. for more information on how fetal brain SCNs develop. Cover image: Ruike Chen and Dan Wu.