I have been interested in this study for some time. Somewhat science and somewhat conjecture. While it might sound like hokey palm reading, researchers are finding that the ratio between the length of your ring and index fingers may in fact correlate to your prenatal exposure to T, (or Estrogen) and have a significant influence on your body, brain, and behavior well into adulthood according to the Art of Maleness.
I have never been totally sure of how to do the measurement and ratio, however found this illustration recently.
First the calculation:
Measure your index and ring fingers, base to tip. (Most of the studies used the right hand.) Divide the length of your index finger (A) by the length of your ring finger (B) to determine the digit ratio, or finger quotient (Fq). A longer ring finger results in an Fq of less than 1 and a more “masculine” hand shape. Simple A divided by B (A/B) calculation. (Source Discover Magazine)
The Art of Maleness continued with this observation and history:
That hit a nerve. It has been speculated that there is a biologic component to gender identity and thus being transgender. I believe that gender is not just a social construct. Google Scholar points to many article that have this similar information:
The Connection Between 2D:4D Ratio and Prenatal Hormones
Objective: To review current literature that supports a biologic basis of gender identity.
Methods: A traditional literature review.
Results: Evidence that there is a biologic basis for gender identity primarily involves (1) data on gender identity in patients with disorders of sex development (DSDs, also known as differences of sex development) along with (2) neuroanatomical differences associated with gender identity.
Conclusions: Although the mechanisms remain to be determined, there is strong support in the literature for a biologic basis of gender identity.
It has been my unscientific conjecture that the transgender persons who states "born in the wrong body " or the lesser degree transgender persons, "relating to the feminine more so than masculine" all have an in vitro feminization component. Sex Hormones in the womb.
Let's revisit this later. However, for now my digit ratio is pretty close to 1.0 or equal 2D:4D. This is close to the expected ratio for cisgender women. Comment or e-mail your results to (Rhonda @ rhondasescape.com). We will discuss this further in another post. This is extremely interesting.