Abstract
Low second-to-fourth-digit (2D:4D) ratios in hands have previously been used as a proxy for prenatal testosterone levels. Moreover, it has recently been suggested that prenatal testosterone levels may direct future masculinization. If true, 2D:4D ratios should negatively correlate with traits in males that are developed and maintained by testosterone at puberty such as facial and body masculinity and testes volume. We failed to find significant correlations between 2D:4D ratios and these traits.
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Selected References
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- Andersson Anna-Maria, Carlsen Elisabeth, Petersen Jørgen Holm, Skakkebaek Niels Erik. Variation in levels of serum inhibin B, testosterone, estradiol, luteinizing hormone, follicle-stimulating hormone, and sex hormone-binding globulin in monthly samples from healthy men during a 17-month period: possible effects of seasons. J Clin Endocrinol Metab. 2003 Feb;88(2):932–937. doi: 10.1210/jc.2002-020838. [DOI] [PubMed] [Google Scholar]
- Bhasin S., Storer T. W., Berman N., Callegari C., Clevenger B., Phillips J., Bunnell T. J., Tricker R., Shirazi A., Casaburi R. The effects of supraphysiologic doses of testosterone on muscle size and strength in normal men. N Engl J Med. 1996 Jul 4;335(1):1–7. doi: 10.1056/NEJM199607043350101. [DOI] [PubMed] [Google Scholar]
- Brown Windy M., Hines Melissa, Fane Briony A., Breedlove S. Marc. Masculinized finger length patterns in human males and females with congenital adrenal hyperplasia. Horm Behav. 2002 Dec;42(4):380–386. doi: 10.1006/hbeh.2002.1830. [DOI] [PubMed] [Google Scholar]
- Firman Renée C., Simmons Leigh W., Cummins James M., Matson Phillip L. Are body fluctuating asymmetry and the ratio of 2nd to 4th digit length reliable predictors of semen quality? Hum Reprod. 2003 Apr;18(4):808–812. doi: 10.1093/humrep/deg174. [DOI] [PubMed] [Google Scholar]
- Manning J. T., Bundred P. E. The ratio of 2nd to 4th digit length: a new predictor of disease predisposition? Med Hypotheses. 2000 May;54(5):855–857. doi: 10.1054/mehy.1999.1150. [DOI] [PubMed] [Google Scholar]
- Manning J. T., Scutt D., Wilson J., Lewis-Jones D. I. The ratio of 2nd to 4th digit length: a predictor of sperm numbers and concentrations of testosterone, luteinizing hormone and oestrogen. Hum Reprod. 1998 Nov;13(11):3000–3004. doi: 10.1093/humrep/13.11.3000. [DOI] [PubMed] [Google Scholar]
- Manning J. T., Taylor R. P. Second to fourth digit ratio and male ability in sport: implications for sexual selection in humans. Evol Hum Behav. 2001 Jan;22(1):61–69. doi: 10.1016/s1090-5138(00)00063-5. [DOI] [PubMed] [Google Scholar]
- Manning JT, Barley L, Walton J, Lewis-Jones DI, Trivers RL, Singh D, Thornhill R, Rohde P, Bereczkei T, Henzi P. The 2nd:4th digit ratio, sexual dimorphism, population differences, and reproductive success. evidence for sexually antagonistic genes? Evol Hum Behav. 2000 May 1;21(3):163–183. doi: 10.1016/s1090-5138(00)00029-5. [DOI] [PubMed] [Google Scholar]
- McFadden Dennis, Shubel Erin. Relative lengths of fingers and toes in human males and females. Horm Behav. 2002 Dec;42(4):492–500. doi: 10.1006/hbeh.2002.1833. [DOI] [PubMed] [Google Scholar]
- Neave Nick, Laing Sarah, Fink Bernhard, Manning John T. Second to fourth digit ratio, testosterone and perceived male dominance. Proc Biol Sci. 2003 Oct 22;270(1529):2167–2172. doi: 10.1098/rspb.2003.2502. [DOI] [PMC free article] [PubMed] [Google Scholar]
- Okten Ayşenur, Kalyoncu Mukaddes, Yariş Nilgün. The ratio of second- and fourth-digit lengths and congenital adrenal hyperplasia due to 21-hydroxylase deficiency. Early Hum Dev. 2002 Dec;70(1-2):47–54. doi: 10.1016/s0378-3782(02)00073-7. [DOI] [PubMed] [Google Scholar]
- Peters Michael, Mackenzie Kevin, Bryden Pam. Finger length and distal finger extent patterns in humans. Am J Phys Anthropol. 2002 Mar;117(3):209–217. doi: 10.1002/ajpa.10029. [DOI] [PubMed] [Google Scholar]
- Swaddle John P., Reierson Gillian W. Testosterone increases perceived dominance but not attractiveness in human males. Proc Biol Sci. 2002 Nov 22;269(1507):2285–2289. doi: 10.1098/rspb.2002.2165. [DOI] [PMC free article] [PubMed] [Google Scholar]
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