Chem. Senses 25: 729-737,
2000
© Oxford University Press 2000
Human Foetuses Learn Odours from their Pregnant Mothers Diet
Laboratoire de Comportement Animal, CNRS ura1291, Unité de Physiologie de la Reproduction et des Comportements, Inra, F-37380 Nouzilly, 1 Centre des Sciences du Goût, CNRS free2049, Université de Bourgogne, Rue A. Picardet, F-21000 Dijon and 2 Laboratoire Personnalité et Conduites Adaptatives, CNRS umr7593, F-75013 Paris, France
Correspondence to be sent to: Benoist Schaal, Laboratoire de Comportement Animal, CNRS ura1291, Unité PRC, Inra, F-37380 Nouzilly, France. e-mail: schaal{at}tours.inra.fr
Olfactory responsiveness was assessed in 24 neonates born to mothers who had or had not consumed anise flavour during pregnancy. Both groups of infants were followed-up for behavioural markers of attraction and aversion when exposed to anise odour and a control odour immediately after birth and on day 4. Infants born to anise-consuming mothers evinced a stable preference for anise odour over this period, whereas those born to anise non-consuming mothers displayed aversion or neutral responses. This study provides the first clear evidence that through their diet human mothers influence the hedonic polarity of their neonates initial olfactory responses. The findings have potential implications for the early mother-to-infant transmission of chemosensory information relative to food and addictive products.
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