Anthropological Review (Dec 2020)
Association patterns between 2D:4D ratio and age at menarche: the impact of methodology
Abstract
The ratio of index finger to ring finger length (2D:4D) is a sexually dimorphic feature and widely used as an indicator of prenatal androgen-estrogen exposure. Several studies have investigated the relationship between the 2D:4D ratio and the onset of the first menstrual period (menarche) in women.
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