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Morphology of NSCs in the subventricular zone of fetuses with different gestational age (SABC, DAB staining, ×400). A: 36 weeks; B: 32 weeks; C: 28 weeks; D: 24 weeks; E: 20 weeks; F: 16 weeks; a: Star-like NSCs; b: Oval NSCs; c: NSCs interacted with each other via synapses; d: Symmetrical division of NSCs; e: Round NSCs; f: Spindle-shaped NSCs.
