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The prenatal environment of the human fetus is now known to have lasting physiological and behavioral effects into childhood and adulthood. The objective of this study was to examine the relationship between early testosterone exposure, as measured by the ratio of the length of the 2nd and 4th digits (2D:4D ratio), and age of menarche. Retrospective, self-report data on menarcheal age were obtained from 206 healthy female college students, as well as finger length ratio data from both hands. |
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Related sources: The Finger Book What our fingers can tell us What they say about men with long ring fingers Left Handedness & Finger Asymmetry Giving Science the Finger Digit Ratio & Agression Finger Length & Facial Characteristics Finger Length & Children's exam results Finger Length & Osteoarthritis Pointing a Finger at Sports Success Double Digits Talk to the Hand |
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