10 citations
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May 2017 in “Symmetry” Higher androgen levels are linked to less asymmetry in !Kung San males.
April 2026 in “Biomolecules” New treatments for PCOS using smart drug delivery, metabolic changes, and AI show promise but need more research.
January 2021 in “ISGE series” Polycystic ovary syndrome causes chronic inflammation affecting all body systems, but proper nutrition, exercise, and supplements can improve the condition.
October 2025 in “JPRAS Open” Many are open to telemedicine for hair loss if combined with in-person visits and better technology.
4 citations
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August 2017 in “Journal of Cosmetic Dermatology” Finger length ratio may indicate male hair loss.
3 citations
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June 2016 in “Dermatology Reports” Finger length ratios don't predict baldness in men.
December 2022 in “The Aging Male” Lower 2D:4D ratio and older age increase the risk of severe hair loss in men.
Digit ratio likely doesn't predict male hair loss.
5 citations
,
May 2019 in “Anais Brasileiros de Dermatologia” Finger length ratios might predict risk for skin condition in males.
December 2025 in “Anatomy (International Journal of Experimental and Clinical Anatomy)” Palmaris longus muscle absence is uncommon and not linked to gender, hand side, or finger ratio.
October 2023 in “Dermatology practical & conceptual” Finger length ratios might help predict common hair loss.
March 2018 in “Benha Journal of Applied Sciences” Finger length ratio is not linked to hirsutism or hormone levels.
3 citations
,
February 2019 in “Disease Markers” The index to ring finger ratio may indicate disease severity in female ankylosing spondylitis patients, but not in males.
Platelet-rich plasma treatment helped heal gangrene in a young woman.
June 2018 in “Biomedical Journal of Scientific and Technical Research” Men with lower 2nd to 4th finger ratios tend to have larger sinus volumes.
17 citations
,
January 1997 in “Cell and Tissue Research” Scientists developed a method to grow human fetal skin and digits in a lab for 3-4 weeks, which could help study skin features and understand genetic interactions in tissue formation.
8 citations
,
September 2016 in “Journal of Investigative Dermatology” Mice with more Flightless I protein grew back their claws better after amputation.
3 citations
,
September 2021 in “Journal of Clinical Medicine” Epidermal signaling helps regenerate fingertip tissue.
Nail stem cells help nail and finger regeneration through BMP signaling.
119 citations
,
January 2000 in “British Journal of Dermatology” Different parts of the nail express different keratins, showing unique patterns of differentiation.
44 citations
,
February 2023 in “Cell” Fingerprints form uniquely before birth due to specific genetic pathways and local signals.
22 citations
,
May 1986 in “Clinics in endocrinology and metabolism” Certain finger length ratios and body hair patterns may predict side effects from birth control pills in women.
2 citations
,
June 2013 in “Journal of Dermatological Case Reports” Olmsted syndrome is a rare skin disorder causing thickened skin and other symptoms.
March 2020 in “UTUPub (University of Turku)” Androgen-driven traits don't predict prostate cancer recurrence.
June 2026 in “Psychoneuroendocrinology” Higher cortisol levels and stress are linked to worse cognition and more fatigue in MS patients.
January 2020 in “AYBU AVESIS” No significant differences in finger ratios or autism scores were found between acne patients and healthy individuals.
January 2018 in “Journal of The American Academy of Dermatology” A manual blood cell counter was effectively used to count hair follicles during surgery, being user-friendly and cost-effective but limited by a three-digit display.
22 citations
,
July 2006 in “Annals of The Royal College of Surgeons of England” Hair or fiber wrapped tightly around a toe can lead to serious injury if not treated quickly.
40 citations
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January 2013 in “Frontiers in Endocrinology” Finger length ratios are not linked to the number of specific gene repeats affecting testosterone sensitivity.
10 citations
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October 2016 in “Experimental Dermatology” Nail stem cells and Wnt signaling are important for fingertip regeneration but not sufficient for regenerating more complex limb structures.