| Title |
Finger-Length Ratios in Female Monozygotic Twins Discordant for Sexual Orientation
|
|---|---|
| Published in |
Archives of Sexual Behavior, February 2003
|
| DOI | 10.1023/a:1021837211630 |
| Pubmed ID | |
| Authors |
Lynn S. Hall, Craig T. Love |
| Abstract |
The second to fourth finger digit ratio (2D:4D ratio) is a sex-dimorphic characteristic in humans that may reflect relative levels of first trimester prenatal sex hormones. Low interdigital ratio has been associated with high levels of androgens. It has been reported in unrelated women that low 2D:4D ratio is associated with lesbian sexual orientation, but because of the nature of those samples, it was not possible to conclude whether lower ratio (and hypothetically, higher androgen levels) in lesbians are due to differences in genetics as opposed to differences in environment. To test the hypothesis that low 2D:4D in lesbians is due to differences in environment, interdigital ratio data were analyzed in a sample of female monozygotic (MZ) twins discordant for sexual orientation (1 twin was lesbian, the other was heterosexual; n = 7 pairs). A control group of female MZ twins concordant for sexual orientation (both twins were lesbian) was used as a comparison (n = 5 pairs). In the twins discordant for sexual orientation, the lesbian twins had significantly lower 2D:4D ratios on both the right and left hands than their heterosexual cotwins. There were no significant differences for either hand in the twins concordant for sexual orientation. Because MZ twins share virtually the same genes, differences in 2D:4D ratio suggest that low 2D:4D ratio is a result of differences in prenatal environment. |
X Demographics
The data shown below were collected from the profile of 1 X user who shared this research output. Click here to find out more about how the information was compiled.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| United States | 1 | 100% |
Demographic breakdown
| Type | Count | As % |
|---|---|---|
| Members of the public | 1 | 100% |
Mendeley readers
The data shown below were compiled from readership statistics for 80 Mendeley readers of this research output. Click here to see the associated Mendeley record.
Geographical breakdown
| Country | Count | As % |
|---|---|---|
| Switzerland | 1 | 1% |
| Macao | 1 | 1% |
| Sweden | 1 | 1% |
| Canada | 1 | 1% |
| United States | 1 | 1% |
| Unknown | 75 | 94% |
Demographic breakdown
| Readers by professional status | Count | As % |
|---|---|---|
| Student > Ph. D. Student | 11 | 14% |
| Professor > Associate Professor | 10 | 13% |
| Researcher | 9 | 11% |
| Student > Bachelor | 7 | 9% |
| Student > Master | 7 | 9% |
| Other | 26 | 33% |
| Unknown | 10 | 13% |
| Readers by discipline | Count | As % |
|---|---|---|
| Psychology | 21 | 26% |
| Agricultural and Biological Sciences | 13 | 16% |
| Social Sciences | 9 | 11% |
| Neuroscience | 7 | 9% |
| Medicine and Dentistry | 6 | 8% |
| Other | 10 | 13% |
| Unknown | 14 | 18% |
Attention Score in Context
This research output has an Altmetric Attention Score of 31. This is our high-level measure of the quality and quantity of online attention that it has received. This Attention Score, as well as the ranking and number of research outputs shown below, was calculated when the research output was last mentioned on 22 September 2020.
All research outputs
#1,265,398
of 25,373,627 outputs
Outputs from Archives of Sexual Behavior
#649
of 3,737 outputs
Outputs of similar age
#2,031
of 140,948 outputs
Outputs of similar age from Archives of Sexual Behavior
#2
of 7 outputs
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