Thanks Anonymouse

I've not seen that one before but it had similar results. This study was done in
Munich, Germany in 2005.
Here are a few excerpts:
"We present novel data that strongly supports a role for biological factors in the etiology of male transsexualism
insofar that MTF display female-typical sexually dimorphic features that have been previously proposed to be
influenced by prenatal androgen exposure."
"If we assume that prenatal androgen exposure has a partial influence on the 2D:4D ratio our data
suggests that males experiencing lower than normal levels of androgen during prenatal developemnt
are more likely to develop transsexuality contrasting with the higher-than-normal prenatal testostorne
levels that have been found in some studies of male homosexuality.
"In summary our study lends support to the view that there is a biological
basis for male to female transsexuality and hints at a causal role for
prenatal androgen levels."
The study does say the right hand for right handed MTF's the ratio is more toward the female range than
for left handed MTF. And the difference is really small. The control group female was .97 and
males .953 with MTF's being almost the same as the control females for the right hand.
I think my ratio is exactly 1.0, there is no visible difference in lengths on either hand.
Amanda