Marc Breedlove

Stephen Marc Breedlove (born 1954)^[1][2] is currently the Barnett Rosenberg professor of Neuroscience at Michigan State University in East Lansing, Michigan.^[3] He was born and raised in the Ozarks of southwestern Missouri.^[2] After graduating from Central High School (Springfield, Missouri) in 1972,^{[citation needed]} he earned a bachelor's degree in Psychology from Yale University in 1976,^[2] and a Ph.D. in Psychology from UCLA in 1982.^[2] He was a professor of Psychology at the University of California, Berkeley from 1982 to 2003,^[2] moving to Michigan State in 2001.^[2] He works in the fields of Biological Psychology and Neuroendocrinology. He is a member of the Society for Neuroscience^[4] and the Society for Behavioral Neuroendocrinology,^[5] and a fellow of the Association for Psychological Science (APS)^[6] and the Biological Sciences section of the American Association for the Advancement of Science (AAAS).^[7]

Research

In numerous papers, he has demonstrated that steroid hormones and sexual behavior affect the developing and adult spinal cord and brain. He also reported that the average digit ratio of lesbians is more masculine than that of straight women,^[8] a finding that has been replicated in his^[9] and many other labs^{[10][11][12][13][14][15][16][17][18][19][20]}and which indicates that lesbians, on average, are exposed to more prenatal testosterone than are straight women. This finding joins many others that biological influences, such as prenatal testosterone and fraternal birth order,^[21] act before birth to affect the later unfolding of human sexual orientation. He has co-authored textbooks in Biological Psychology^[22] and Behavioral Neuroendocrinology.^[23]

See also

• Biology and sexual orientation
• Prenatal hormones and sexual orientation
• Sexual orientation

References

1. ^ [1]
2. ^ ^{a b c d e f} Breedlove, S. Marc (18 March 2009). "Curriculum Vitae". http://neuroscience.msu.edu/people/faculty/breedlove_cv.pdf. Retrieved 31 October 2009. ^{[self-published source?]}
3. ^ "Cellular/Molecular Neuroscience Faculty". Michigan State University. 2008. http://neuroscience.msu.edu/cellular.html. Retrieved 31 October 2009. 
4. ^ "Donald B. Lindsley Prize in Behavioral Neuroscience". http://www.sfn.org/index.cfm?pagename=FellowshipAndAwards_lindsley. 
5. ^ "Hormones & Behavior Editorial Board". http://www.elsevier.com/wps/find/journaleditorialboard.cws_home/622842/editorialboard. 
6. ^ "List of APS Fellows". http://www.psychologicalscience.org/fellows/fellows.cfm. 
7. ^ "AAAS Members Elected as Fellows". http://www.aaas.org/news/releases/2009/1218fellows.shtml. 
8. ^ Williams TJ, Pepitone ME, Christensen SE, et al. (March 2000). "Finger-length ratios and sexual orientation". Nature 404 (6777): 455–6. doi:10.1038/35006555. PMID 10761903. http://msu.edu/~breedsm/pdf/breedlove2000.pdf. 
9. ^ Brown WM, Finn CJ, Cooke BM, Breedlove SM (February 2002). "Differences in finger length ratios between self-identified 'butch' and 'femme' lesbians". Archives of Sexual Behavior 31 (1): 123–7. doi:10.1023/A:1014091420590. PMID 11910785. https://www.msu.edu/~breedsm/pdf/ButchFemme.pdf. 
10. ^ Tortorice JL (2002). Written on the body: butch/femme lesbian gender identity and biological correlates. Rutgers University. OCLC 80234273. ^{[self-published source?]}
11. ^ McFadden D, Shubel E (December 2002). "Relative lengths of fingers and toes in human males and females". Hormones and Behavior 42 (4): 492–500. doi:10.1006/hbeh.2002.1833. PMID 12488115. 
12. ^ Hall LS, Love CT (February 2003). "Finger-length ratios in female monozygotic twins discordant for sexual orientation". Archives of Sexual Behavior 32 (1): 23–8. doi:10.1023/A:1021837211630. PMID 12597269. 
13. ^ Rahman Q, Wilson GD (April 2003). "Sexual orientation and the 2nd to 4th finger length ratio: evidence for organising effects of sex hormones or developmental instability?". Psychoneuroendocrinology 28 (3): 288–303. doi:10.1016/S0306-4530(02)00022-7. PMID 12573297. 
14. ^ Csathó A, Osváth A, Bicsák E, Karádi K, Manning J, Kállai J (February 2003). "Sex role identity related to the ratio of second to fourth digit length in women". Biological Psychology 62 (2): 147–56. doi:10.1016/S0301-0511(02)00127-8. PMID 12581689. 
15. ^ Putz, David A.; Gaulin, Steven J. C.; Sporter, Robert J.; McBurney, Donald H. (May 2004). "Sex hormones and finger length: What does 2D:4D indicate?". Evolution and Human Behavior 25 (3): 182–99. doi:10.1016/j.evolhumbehav.2004.03.005. http://www.anth.ucsb.edu/faculty/gaulin/page1/Puts_et_al_2004.pdf. 
16. ^ Rahman Q (May 2005). "Fluctuating asymmetry, second to fourth finger length ratios and human sexual orientation". Psychoneuroendocrinology 30 (4): 382–91. doi:10.1016/j.psyneuen.2004.10.006. PMID 15694118. 
17. ^ Kraemer B, Noll T, Delsignore A, Milos G, Schnyder U, Hepp U (2006). "Finger length ratio (2D:4D) and dimensions of sexual orientation". Neuropsychobiology 53 (4): 210–4. doi:10.1159/000094730. PMID 16874008. 
18. ^ Wallien MS, Zucker KJ, Steensma TD, Cohen-Kettenis PT (August 2008). "2D:4D finger-length ratios in children and adults with gender identity disorder". Hormones and Behavior 54 (3): 450–4. doi:10.1016/j.yhbeh.2008.05.002. PMID 18585715. 
19. ^ Grimbos T, Dawood K, Burriss RP, Zucker KJ, Puts DA (2010). "Sexual orientation and the second to fourth finger length ratio: a meta-analysis in men and women". Behav Neurosci 124 (2): 278–287. doi:10.1037/a0018764. PMID 20364887. 
20. ^ Breedlove, S.M (2010). "Organizational Hypothesis: Instances of the Fingerpost.". Endocrinology 151 (9): 4116–22. doi:10.1210/en.2010-0041. PMC 2940503. PMID 20631003. http://www.pubmedcentral.nih.gov/articlerender.fcgi?tool=pmcentrez&artid=2940503. 
21. ^ Puts DA, Jordan CL, Breedlove SM (July 2006). "O brother, where art thou? The fraternal birth-order effect on male sexual orientation". Proceedings of the National Academy of Sciences of the United States of America 103 (28): 10531–2. doi:10.1073/pnas.0604102103. PMC 1502267. PMID 16815969. http://msu.edu/~breedsm/pdf/BogaertCommentary2006.pdf. 
22. ^ S. Marc Breedlove, Neil V. Watson and Mark Rosenzweig (2010). Biological Psychology: An Introduction to Behavioral and Cognitive Neuroscience (6th Ed). Sinauer Associates. ISBN 978-0878933242
23. ^ Jill B. Becker, S. Marc Breedlove, David Crews and Margaret M. McCarthy (2002). Behavioral Endocrinology, (2nd Ed). MIT Press. ISBN 978-0262523219

External links

• The Breedlove Jordan Lab Lab home page
• PDF files of selected papers
• PubMed listing of scientific papers
• Biological Psychology Textbook co-author
• Biological Psychology Links Web page editor
• Behavioral Endocrinology Textbook co-author
• Summer School of Behavioral Neuroendocrinology Co-Founder
• Neuroscience Program at MSU
• The Science of Sexual Orientation (60 Minutes)
• "Marc Breedlove Named MSU's First Rosenberg Chair in Neuroscience" (Press release). Michigan State University. 22 June 2001. http://news.msu.edu/story/1424/. Retrieved 31 October 2009. 
• Interview on biology of sexual orientation in the Washington Post
• Author profile on Amazon
• Society for Behavioral Neuroendocrinology
• Society for Neuroscience

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Name	Breedlove, Marc
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Date of birth	1954
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