This is an illustration demonstrating the Wolfsdorf Staging for axillary hair development in children.[1]
Underarm or axillary hair goes through four stages of development, driven by weak androgens produced by the adrenal in males and females during adrenarche, and testosterone from the testicle in males during puberty.[2]
The importance of human underarm hair is unclear. It may naturally wick sweat or other moisture away from the skin, aiding ventilation. Colonization by odor-producing bacteria is thereby transferred away from the skin (see skin flora).[3]
Male axilla
Female axilla
Function
Reducing friction
Armpit hair prevents skin-to-skin contact during activities that involve arm motion, such as running and walking. The same applies to pubic hair.[4][better source needed]
Spreading pheromones
The armpits release odor-containing pheromones, a naturally produced chemical that plays an important role in sexual attraction. Armpit hair traps odor, making the pheromones even stronger. A study in 2018 including 96 heterosexual couples found that there were stress-relieving benefits to smelling a romantic partner’s natural scent.[5]
Impact of hair removal
Effect on odor
А 2012 study on the impact of hair removal on odor found that shaved armpits were rated the same as unshaved armpits.[6]
Chemical absorption
A 2017 study on chemical absorption from deodorants as a result of hair removal showed an increase in chemical absorption from .01% to .06% where skin has been damaged by recent shaving.[7]
A 2003 study on aluminum antiperspirant usage and the age of breast cancer onset tentatively concluded that “underarm shaving with antiperspirant/deodorant use may play a role in breast cancer.”[8]
^Pineau, Jean-Claude (2020). "Age estimation of teenage boys during puberty". American Journal of Forensic Medicine and Pathology. Williams & Wilkins. 41 (3): 188–193. doi:10.1097/PAF.0000000000000573. PMID 32796206. S2CID 221257760.
^Auchus RJ, Rainey WE (March 2004). "Adrenarche - physiology, biochemistry and human disease". Clinical Endocrinology. 60 (3): 288–296. doi:10.1046/j.1365-2265.2003.01858.x. PMID 15008992.
^"MRSA superbug? Part 1". PsycEXTRA Dataset. 2007. doi:10.1037/e721542007-001. Retrieved 12 July 2022.
^Hofer MK, Collins HK, Whillans AV, Chen FS (January 2018). "Olfactory cues from romantic partners and strangers influence women's responses to stress". Journal of Personality and Social Psychology. 114 (1): 1–9. doi:10.1037/pspa0000110. PMID 29293018. S2CID 40410769.
^Kohoutová D, Rubešová A, Havlíček J (April 2012). "Shaving of axillary hair has only a transient effect on perceived body odor pleasantness". Behavioral Ecology and Sociobiology. 66 (4): 569–581. doi:10.1007/s00265-011-1305-0. ISSN 0340-5443. S2CID 16607684.
^Klotz K, Weistenhöfer W, Neff F, Hartwig A, van Thriel C, Drexler H (September 2017). "The Health Effects of Aluminum Exposure". Deutsches Ärzteblatt International. 114 (39): 653–659. doi:10.3238/arztebl.2017.0653. PMC5651828. PMID 29034866.
^McGrath KG (December 2003). "An earlier age of breast cancer diagnosis related to more frequent use of antiperspirants/deodorants and underarm shaving". European Journal of Cancer Prevention. 12 (6): 479–485. doi:10.1097/00008469-200312000-00006. PMID 14639125. S2CID 24938503.
External links
Media related to Underarm hair at Wikimedia Commons
January 07, 2023
underarm, hair, also, known, axillary, hair, hair, underarm, area, axilla, detailsidentifierslatinhircita98a16, 021ta27061fma70756anatomical, terminology, edit, wikidata, contents, development, function, reducing, friction, spreading, pheromones, impact, hair,. Underarm hair also known as axillary hair is the hair in the underarm area axilla Underarm hairDetailsIdentifiersLatinhirciTA98A16 0 00 021TA27061FMA70756Anatomical terminology edit on Wikidata Contents 1 Development 2 Function 2 1 Reducing friction 2 2 Spreading pheromones 3 Impact of hair removal 3 1 Effect on odor 3 2 Chemical absorption 4 See also 5 References 6 External linksDevelopment Edit This is an illustration demonstrating the Wolfsdorf Staging for axillary hair development in children 1 Underarm or axillary hair goes through four stages of development driven by weak androgens produced by the adrenal in males and females during adrenarche and testosterone from the testicle in males during puberty 2 The importance of human underarm hair is unclear It may naturally wick sweat or other moisture away from the skin aiding ventilation Colonization by odor producing bacteria is thereby transferred away from the skin see skin flora 3 Male axilla Female axillaFunction EditReducing friction Edit Armpit hair prevents skin to skin contact during activities that involve arm motion such as running and walking The same applies to pubic hair 4 better source needed Spreading pheromones Edit The armpits release odor containing pheromones a naturally produced chemical that plays an important role in sexual attraction Armpit hair traps odor making the pheromones even stronger A study in 2018 including 96 heterosexual couples found that there were stress relieving benefits to smelling a romantic partner s natural scent 5 Impact of hair removal EditEffect on odor Edit A 2012 study on the impact of hair removal on odor found that shaved armpits were rated the same as unshaved armpits 6 Chemical absorption Edit A 2017 study on chemical absorption from deodorants as a result of hair removal showed an increase in chemical absorption from 01 to 06 where skin has been damaged by recent shaving 7 A 2003 study on aluminum antiperspirant usage and the age of breast cancer onset tentatively concluded that underarm shaving with antiperspirant deodorant use may play a role in breast cancer 8 See also EditAdrenal gland Adrenarche Ferriman Gallwey score Hirsutism History of removal of leg and underarm hair in the United States Puberty Tanner stagingReferences Edit Pineau Jean Claude 2020 Age estimation of teenage boys during puberty American Journal of Forensic Medicine and Pathology Williams amp Wilkins 41 3 188 193 doi 10 1097 PAF 0000000000000573 PMID 32796206 S2CID 221257760 Auchus RJ Rainey WE March 2004 Adrenarche physiology biochemistry and human disease Clinical Endocrinology 60 3 288 296 doi 10 1046 j 1365 2265 2003 01858 x PMID 15008992 Paye M Maibach HI Barel AO 2009 Handbook of cosmetic science and technology 3 ed Informa Health Care p 703 ISBN 978 1 4200 6963 1 MRSA superbug Part 1 PsycEXTRA Dataset 2007 doi 10 1037 e721542007 001 Retrieved 12 July 2022 Hofer MK Collins HK Whillans AV Chen FS January 2018 Olfactory cues from romantic partners and strangers influence women s responses to stress Journal of Personality and Social Psychology 114 1 1 9 doi 10 1037 pspa0000110 PMID 29293018 S2CID 40410769 Kohoutova D Rubesova A Havlicek J April 2012 Shaving of axillary hair has only a transient effect on perceived body odor pleasantness Behavioral Ecology and Sociobiology 66 4 569 581 doi 10 1007 s00265 011 1305 0 ISSN 0340 5443 S2CID 16607684 Klotz K Weistenhofer W Neff F Hartwig A van Thriel C Drexler H September 2017 The Health Effects of Aluminum Exposure Deutsches Arzteblatt International 114 39 653 659 doi 10 3238 arztebl 2017 0653 PMC 5651828 PMID 29034866 McGrath KG December 2003 An earlier age of breast cancer diagnosis related to more frequent use of antiperspirants deodorants and underarm shaving European Journal of Cancer Prevention 12 6 479 485 doi 10 1097 00008469 200312000 00006 PMID 14639125 S2CID 24938503 External links Edit Media related to Underarm hair at Wikimedia Commons Retrieved from https en wikipedia org w index php title Underarm hair amp oldid 1128946891, wikipedia, wiki, book, books, library,
