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Shirazi TN, Self H, Dawood K, Welling LLM, Cárdenas R, Rosenfield KA, Bailey JM, Balasubramanian R, Delaney A, Breedlove SM, Puts DA. Evidence that perinatal ovarian hormones promote women's sexual attraction to men. Psychoneuroendocrinology 2021; 134:105431. [PMID: 34601343 PMCID: PMC8957625 DOI: 10.1016/j.psyneuen.2021.105431] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 05/12/2021] [Revised: 09/21/2021] [Accepted: 09/21/2021] [Indexed: 11/24/2022]
Abstract
Ovarian estrogens may influence the development of the human brain and behavior, but there are few opportunities to test this possibility. Isolated GnRH deficiency (IGD) is a rare endocrine disorder that could provide evidence for the role of estrogens in organizing sexually differentiated phenotypes: Unlike typical development, development in individuals with IGD is characterized by low or absent gonadal hormone production after the first trimester of gestation. Because external genitalia develop in the first trimester, external appearance is nevertheless concordant with gonadal sex in people with IGD. We therefore investigated the effects of gonadal hormones on sexual orientation by comparing participants with IGD (n = 97) to controls (n = 1670). Women with IGD reported lower male-attraction compared with typically developing women. In contrast, no consistent sexuality differences between IGD and typically developing men were evident. Ovarian hormones after the first trimester appear to influence female-typical dimensions of sexual orientation.
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Affiliation(s)
- Talia N Shirazi
- Department of Anthropology, Pennsylvania State University, Carpenter Building, University Park, PA 16802, USA
| | - Heather Self
- Department of Anthropology, Pennsylvania State University, Carpenter Building, University Park, PA 16802, USA
| | - Khytam Dawood
- Department of Psychology, Pennsylvania State University, Moore Building, University Park, PA 16802, USA
| | - Lisa L M Welling
- Department of Psychology, Oakland University, 212 Pryale Hall, Rochester, MI 48309, USA
| | - Rodrigo Cárdenas
- Department of Psychology, Pennsylvania State University, Moore Building, University Park, PA 16802, USA
| | - Kevin A Rosenfield
- Department of Anthropology, Pennsylvania State University, Carpenter Building, University Park, PA 16802, USA
| | - J Michael Bailey
- Department of Psychology, Northwestern University, Swift Hall 303B, Evanston, IL 60208, USA
| | | | - Angela Delaney
- Reproductive Physiology and Pathophysiology Group, National Institutes of Health, 10 Center Drive, Bethesda, MD 20814, USA
| | - S Marc Breedlove
- Neuroscience Program and Department of Psychology, Michigan State University, 240 Giltner Hall, East Lansing, MI 48824, USA
| | - David A Puts
- Department of Anthropology, Pennsylvania State University, Carpenter Building, University Park, PA 16802, USA.
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Diamond LM. The New Genetic Evidence on Same-Gender Sexuality: Implications for Sexual Fluidity and Multiple Forms of Sexual Diversity. JOURNAL OF SEX RESEARCH 2021; 58:818-837. [PMID: 33620277 DOI: 10.1080/00224499.2021.1879721] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/02/2023]
Abstract
In September of 2019, the largest-ever (N = 477,522) genome-wide-association study of same-gender sexuality was published in Science. The primary finding was that multiple genes are significantly associated with ever engaging in same-gender sexual behavior, accounting for between 8-25% of variance in this outcome. Yet an additional finding of this study, which received less attention, has more potential to transform our current understanding of same-gender sexuality: Specifically, the genes associated with ever engaging in same-gender sexual behavior differed from the genes associated with one's relative proportion of same-gender to other-gender behavior. I review recent research on sexual orientation and sexual fluidity to illustrate how these findings speak to longstanding questions regarding distinctions among subtypes of same-gender sexuality (such as mostly-heterosexuality, bisexuality, and exclusive same-gender experience). I conclude by outlining directions for future research on the multiple causes and correlates of same-gender expression.
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Luoto S, Krams I, Rantala MJ. Response to Commentaries: Life History Evolution, Causal Mechanisms, and Female Sexual Orientation. ARCHIVES OF SEXUAL BEHAVIOR 2019; 48:1335-1347. [PMID: 31119422 DOI: 10.1007/s10508-019-1439-0] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/07/2019] [Accepted: 03/16/2019] [Indexed: 06/09/2023]
Affiliation(s)
- Severi Luoto
- English, Drama and Writing Studies, University of Auckland, Arts 1, Bldg. 206, Room 616, 14A Symonds St., Auckland, 1010, New Zealand.
- School of Psychology, University of Auckland, Auckland, New Zealand.
| | - Indrikis Krams
- Department of Zoology and Animal Ecology, University of Latvia, Rīga, Latvia
- Institute of Ecology and Earth Sciences, University of Tartu, Tartu, Estonia
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