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Lookup NU author(s): Dr Caroline Allen
This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License (CC BY-NC-ND).
There is evidence across a range of bi-parental species that physiological changes may occur in partnered males prior to the birth of an infant. It has been hypothesised that these hormonal changes might facilitate care-giving behaviours, which could augment infant survival. The mechanism that induces these changes has not been identified, but evidence from several species suggests that odour may play a role. The current study investigated this in humans by recording testosterone and psychological measures related to infant interest and care in men (n = 91) both before and after exposure to odours from either pregnant women or non-pregnant control women. We found no evidence for effect of odour cues of pregnancy on psychological measures including self-reported sociosexual orientation and social dominance scores, ratings of adult faces, or testosterone levels. However, we found that brief exposure to post-partum odours significantly increased the reward value of infant faces. Our study is the first to show that the odour of peri-partum women may lead to upregulation of men's interest in infants.
Author(s): Allen C, Cobey KD, Havlicek J, Singleton FP, Hahn AC, Moran CN, Roberts SC
Publication type: Article
Publication status: Published
Journal: Physiology and Behavior
Print publication date: 01/07/2019
Online publication date: 10/04/2019
Acceptance date: 31/03/2019
Date deposited: 16/04/2019
ISSN (print): 0031-9384
ISSN (electronic): 1873-507X
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