Literature DB >> 16143332

Finger-length ratios show evidence of prenatal hormone-transfer between opposite-sex twins.

Sari M van Anders1, Philip A Vernon, Christopher J Wilbur.   

Abstract

Finger-length ratio (second to fourth finger; 2D:4D) has been associated with various measures thought to be related to prenatal androgens. In addition, hormone-transfer theory posits that hormones can transfer between twins. We examined 2D:4D in same-sex (SS) and opposite-sex (OS) dizygotic twins to test both propositions. Results show that 2D:4D is masculinized in OS females compared to SS females. This provides strong evidence that 2D:4D is laid down prenatally, and that hormones (likely androgens) can transfer from male to female fetuses. Implications for developmental timeframes for both hormone-transfer and 2D:4D are discussed.

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Year:  2005        PMID： 16143332     DOI： 10.1016/j.yhbeh.2005.08.003

Source DB:  PubMed          Journal:  Horm Behav        ISSN： 0018-506X            Impact factor:   3.587


  29 in total

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