Body hair

Body- and facial-hair distribution patterns, density, color, and texture. Excludes pubic-region hair (covered in pubic-region.json) and head hair (covered in head-hair.json). The Ferriman-Gallwey scale (1961) is the canonical clinical reference for terminal-hair density across nine body regions; this vocabulary captures that pattern at observability-appropriate granularity for photograph-based assessment.

Dimensions

• Ferriman-Gallwey terminal-hair density (visual estimate)

  rarely from photo

  ordinal · ferriman_gallwey_1961

  Visual estimate of overall terminal-hair density. The original 0-36 numeric scale (0-3 across nine body regions) summed to a clinical hirsutism cutoff; this dimension uses qualitative buckets that aggregate the per-region scores for photograph-based assessment.

  Ferriman D, Gallwey JE (1961). Clinical assessment of body hair growth in women. Journal of Clinical Endocrinology and Metabolism, 21(11): 1440-1447.

  Valid values (5)

  • minimalMinimal (FG estimated 0-4)— Below clinical hirsutism threshold; minimal visible body hair.
  • mildMild (FG ~5-8)— Borderline; some terminal hair across body regions.
  • moderateModerate (FG ~9-15)— Above clinical hirsutism threshold for women; substantial terminal hair distribution.
  • markedMarked (FG ~16+)— Pronounced terminal hair distribution.
  • not_assessableNot assessable— Body coverage prevents assessment.

• Facial hair (male) — beard distribution

  photo-observable

  categorical · facial_hair_distribution_qualitative

  Distribution and density of facial hair in subjects with apparent male physiognomy.

  Aligned with descriptors used in dermatology and trichology literature on terminal-hair distribution patterns.

  Valid values (9)

  • absent_clean_shaven_or_lowAbsent / clean-shaven or low capacity
  • patchyPatchy— Uneven coverage with visible bare patches.
  • mustache_onlyMustache only
  • goatee_chin_onlyGoatee / chin only
  • full_beard_lightFull beard — light density
  • full_beard_denseFull beard — dense
  • full_beard_very_denseFull beard — very dense
  • stubble_onlyStubble only— Recently shaved; native density not directly assessable.
  • not_applicableNot applicable— Subject not in male physiognomy.

• Chest hair distribution (male)

  photo-observable

  categorical · chest_hair_pattern_qualitative

  Pattern and density of terminal chest hair in subjects with apparent male physiognomy.

  Aligned with descriptors used in trichology literature on chest-hair patterns.

  Valid values (7)

  • absent_minimalAbsent / minimal
  • central_strip_onlyCentral strip only— Hair limited to a vertical central band.
  • moderate_chest_onlyModerate, chest only— Hair across the chest but not extending to abdomen.
  • extensive_chest_to_abdomenExtensive, chest extending to abdomen— Continuous distribution from chest to abdomen.
  • very_dense_fullVery dense / full
  • groomed_unclearGroomed (waxed/shaved)— Visible removal; native distribution not assessable.
  • not_applicableNot applicable

• Abdominal hair pattern

  photo-observable

  categorical · abdominal_hair_qualitative

  Pattern of abdominal hair, including the 'happy trail' linea alba pattern.

  Aligned with terminal-hair distribution descriptors in dermatology literature.

  Valid values (5)

  • absentAbsent
  • linea_alba_stripLinea alba strip ('happy trail')— Vertical strip from navel to pubis only.
  • diffuse_lightDiffuse, light— Light coverage spreading from midline.
  • diffuse_denseDiffuse, dense— Full abdominal hair coverage.
  • groomed_unclearGroomed— Visible removal; native pattern not assessable.

• Arm hair density

  photo-observable

  ordinal · arm_hair_density_qualitative

  Density of arm hair on the dorsal forearm.

  Aligned with terminal-hair descriptors in dermatology literature.

  Valid values (5)

  • minimalMinimal
  • lightLight
  • moderateModerate
  • denseDense
  • groomedGroomed (removal visible)

• Leg hair density

  photo-observable

  ordinal · leg_hair_density_qualitative

  Density of leg hair (anterior tibial / calf region).

  Aligned with terminal-hair descriptors in dermatology literature.

  Valid values (5)

  • minimalMinimal
  • lightLight
  • moderateModerate
  • denseDense
  • groomedGroomed (removal visible)

• Back hair pattern (male)

  photo-observable

  categorical · back_hair_qualitative

  Distribution of back hair in subjects with apparent male physiognomy.

  Aligned with terminal-hair descriptors in dermatology literature.

  Valid values (6)

  • absent_minimalAbsent / minimal
  • shoulder_onlyShoulders only
  • upper_backUpper back
  • full_backFull back
  • groomedGroomed
  • not_applicableNot applicable

• Body hair color

  partly photo-observable

  categorical · body_hair_color_qualitative

  Body-hair color relative to scalp hair.

  Aligned with trichology descriptors of differential body / scalp hair pigmentation.

  Valid values (4)

  • matches_scalpMatches scalp
  • darker_than_scalpDarker than scalp
  • lighter_than_scalpLighter than scalp
  • mixed_agingMixed (graying)