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The topic is about the role of prenatal androgen exposure in genital development and its potential link to penis size.
A handful of studies report that among gay men those who prefer an insertive anal-sex role ("tops") show lower, more male-typical right-hand ratios than those who prefer receptive roles ("bottoms"), b...
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...
Current research finds multiple lines of biological evidence — genetic variants, prenatal hormone pathways, and brain structural and functional differences — that together suggest gender identity has ...
Two peer‑reviewed arrived at different, specific conclusions: an study reported a statistically significant correlation between the second‑to‑fourth digit ratio (2D:4D) and adult penile length, sugges...
There is scientific evidence of a small but statistically significant negative correlation between the second‑to‑fourth digit ratio (2D:4D) and stretched penile length in adult men reported primarily ...