| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 323959 | Hormones and Behavior | 2006 | 5 Pages |
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.
Related Topics
Life Sciences
Biochemistry, Genetics and Molecular Biology
Endocrinology
Authors
Sari M. van Anders, Philip A. Vernon, Christopher J. Wilbur,