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Schematic representation of the main not routinely applied procedures for FP: gonadal tissues, follicles, and spermatogonial stem cells. LN, Liquid Nitrogen; SSC, spermatogonial stem cells; Solid lines, often used procedure; Dashed lines, not often used procedures/experimental; Triangle, still undecided if feasible for FP purposes or not. The figure was realized with BioRender.
