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2D:4D ratio and autism

The relationship between the 2D:4D ratio and autism spectrum traits, specifically among gay men

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Jan 28, 2026
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Does 2D4D link to ASR amongst gay men?

The hypothesis that the second-to-fourth digit ratio ()—a putative marker of exposure—links (ASR) specifically among gay men is biologically plausible but unsupported by clear empirical evidence: stud...