Index-to-ring finger length ratio (2D:4D) predicts levels of salivary estradiol, but not progesterone, over the menstrual cycle
Article first published online: 9 APR 2007
Copyright © 2007 Wiley-Liss, Inc.
American Journal of Human Biology
Volume 19, Issue 3, pages 434–436, May/June 2007
How to Cite
McIntyre, M. H., Chapman, J. F., Lipson, S. F. and Ellison, P. T. (2007), Index-to-ring finger length ratio (2D:4D) predicts levels of salivary estradiol, but not progesterone, over the menstrual cycle. Am. J. Hum. Biol., 19: 434–436. doi: 10.1002/ajhb.20623
- Issue published online: 9 APR 2007
- Article first published online: 9 APR 2007
- Manuscript Accepted: 1 DEC 2006
- Manuscript Revised: 29 NOV 2006
- Manuscript Received: 28 SEP 2006
We tested the association between the index-to-ring finger length ratio (2D:4D) and ovarian steroid hormone concentrations measured over the course of a menstrual cycle in the saliva of 38 young women. Estradiol levels were positively associated with right-hand, but not left-hand, 2D:4D, and also with the difference between right- and left-hand 2D:4D. None of these measures predicted progesterone level.Am. J. Hum. Biol. 19:434–436, 2007. © 2007 Wiley-Liss, Inc.