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Age differences in prenatal testosterone's protective effects on disordered eating symptoms: developmental windows of expression?

Abstract：

:Prenatal testosterone exposure may be protective against disordered eating. However, prior studies have produced mixed results. Developmental differences in prenatal testosterone's protective effects on disordered eating may explain these discrepancies. Indeed, studies have differed in the age of participants assessed, with data supporting prenatal testosterone effects on disordered eating in early adolescent and young adult samples but not in late adolescence. The present studies are the first to investigate age differences in prenatal testosterone's protective effects on disordered eating. Two indirect markers of higher prenatal testosterone were examined: (a) lower finger-length ratios (Study 1: index [2D]/ring [4D] finger [2D:4D]) and (b) lower disordered eating in female s from opposite-sex twin pairs (who are thought to be exposed to higher prenatal testosterone from their male co-twin) relative to female controls (Study 2). Participants were twins from the Michigan State University Twin Registry (Study 1: n = 409; Study 2: n = 1,538) in early adolescence, late adolescence, or young adulthood. Disordered eating was assessed with well-validated questionnaires. Finger-length ratios were measured from hand scans, using electronic computer calipers. Findings were consistent across both studies. Higher prenatal testosterone (lower 2D:4D; females from opposite-sex twin pairs vs. controls) predicted lower disordered eating in early adolescence and young adulthood only. Prenatal testosterone-disordered eating associations were not observed during late adolescence. Results point to the possibility of developmental windows of expression for prenatal testosterone's protective effects on disordered eating and suggest that prior discrepant results may reflect age differences across samples.

journal_name

Behav Neurosci

journal_title

Behavioral neuroscience

authors

Culbert KM,Breedlove SM,Sisk CL,Keel PK,Neale MC,Boker SM,Burt SA,Klump KL

doi

10.1037/bne0000034

subject

Has Abstract

pub_date

2015-02-01 00:00:00

pages

18-36

issue

eissn

0735-7044

issn

1939-0084

pii

2015-03147-004

journal_volume

129

pub_type

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Age differences in prenatal testosterone's protective effects on disordered eating symptoms: developmental windows of expression?