GelMA were poorly defined due to the significant deformation and broadening of the extruded filaments prior to crosslinking, while higher GelMA contents produced less deformable fibers, which resulted in well-defined squares. The width of the extruded fiber was also correlated with the printing speed, with a tendency to decrease at higher speeds (Figure ). This result also highlights the importance of the printing speed on the fiber width and, therefore, on the shape fidelity of the bioprinted construct. experiments were conducted at 37 ºC, using 0.5% LAP, and crosslinking with 15% 405 nm light.