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Micrographs showing hair strands and medulla (continuous, discontinuous, or absent) of male and female participants. (a) Female scalp hair with absent medulla, (b) female eyebrow hair with indistinguishable medulla, (c) female axillary hair with discontinuous medulla, (d) female pubic hair with continuous medulla deficient toward the tip, and (e-h) shows male scalp, eyebrow, axillary, and pubic strands. Artificial color has been added to improve contrast
