This article addresses European and North American hormone theories and the way those were received in the field of Argentine bio-typology in the 1930's. It surveys a series of articles published in the journal Anales de Biotipología [Annals of Bio-typology], and one medical case history presented in Archivos Argentinos de Pediatría [Argentine Pediatrics Archive]. Focus is placed on girls' and boys' treatment, to inquire into the ways the medical-scientific field intervened in the construction of sexual difference, and on how certain social conceptions of gender mediated bio-medical practice.
Childhood; Endocrinology; Eugenics; Sexuality; Bio-typology