The second to fourth digit ratio in patients with congenital IGF-1 deficiency

Yoav Uchitel, Rivka Kauli, Osnat Konen, Pearl Lilos, Zvi Laron

Research output: Contribution to journalArticlepeer-review

Abstract

The relationship between the length of the second and fourth ring finger (2D:4D ratio) is a sexually dimorphic trait, higher in females than in males. It is established during early prenatal development under the influence of sex hormones, as demonstrated in numerous studies both in humans and in mice. The current study involves patients with congenital GH/IGF-1 deficiency, a population not yet investigated. The 2D:4D ratio was measured from hand x-rays and compared with normal hand x-rays taken from the Greulich & Pyle Atlas. The analyses of our results revealed that patients with congenital GH/IGF-1 deficiency show an identical 2D:4D ratio for both sexes, but a higher (more feminine) ratio than the normal population. These findings may be explained by a higher estrogen effect resulting from the absence of a functional GH-IGF-1 axis prenatally.

Original languageEnglish
Pages (from-to)91-93
Number of pages3
JournalAnthropologischer Anzeiger
Volume76
Issue number2
DOIs
StatePublished - 2019
Externally publishedYes

Keywords

  • 2D:4D ratio
  • Growth hormone
  • IGF-1 deficiency
  • Isolated GH deficien
  • Laron syndrome

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