Environmental and genetic influences on early attachment.

Child Adolesc Psychiatry Ment Health · 2009 · PMC2753321 · PMID 19732441

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While Dutch researchers have failed to replicate this association [ 97 , 98 ], parental genetic data and family-based analyses in the Hungarian sample showed a highly significant non-transmission of the 7-repeat allele (and the -521T~7-repeat haplotype) to securely attached infants, as well as a trend for preferential transmission to disorganised infants [ 95 ].

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