Hormones and handedness

Robert D. Nass, Susan W. Baker, Phyllis Speiser, R Virdis, Antonio Balsamo, E Cacciari, Alberto Loche, Miroslav Dumić, M I New

Neurology · 1987 · 149 citations · 0 references

Concepts

Abstract

An excess of left-handers among males has been attributed to early androgen exposure. This theory was supported by our observation that girls with congenital adrenal hyperplasia (CAH) are more left-biased than their normal sisters. Male CAH patients, with prenatal androgen exposure similar to that of unaffected brothers, had typical male-handedness patterns.