Is it true that difference in finger length is linked to levels of testosterone...if so how??

Answer 1

Its more to do with overall size of hands, feet, etc. Low levels of testosterone inhibit development, which carries on in males up to the age of about 18, even though the rate of development slows down. When testosterone is low, this continued development doesn't happen to the same degree.

Answer 2

I watched a program about it [too ..?].

And this scientific researcher was saying he could predict who had higher testosterone levels at certain stage of their development. The development of the ring fingers is more (compared to the middle finger) for those who have had exprosure to higher levels of T during this stage.

During development, especially before birth, testosterone influences the make-up of a person - more testosterone defining the sex of the baby, its male personality characteristics (in behavour), and various other general physical and psychological aspects. And this happens in specific stages. During each stage, certain types of developments takes place.

And because this (finger-length ratio) was also developed at the same time as another trait (can't remember which, think it was related to fitness/physical), he was saying it was a good indicator that those who were well-developed in one were likely to be so in the other (compared to those who did'nt have these traits, at least).

And he managed to predict quite accurately (on tv) that there was this link (they had clearly got positive correlation on this in their research).

Answer 3

Loss of bone, increased fracture risk
Loss of skeletal muscle and strength
Increased fat mass
Reduced libido
Reduced erectile function
Infertility
Increased insulin resistance and risk of diabetes
Reduced sense of well-being
Fatigue
Reduced stamina
Depression
Reduced cognition

These are all documented medical consequences of a testosterone deficiency."the rate of longitudinal bone growth is regulated by several endocrine signals including growth hormone, IGF-I, androgen, estrogen, glucocorticoid, and thyroid hormone." Recent research seems to indicate that while testosterone(reflected in androgen) plays a role it is not well understood. I would love to hear the genesis of a query like this. Answers to questions like these are doubtless linked to so many different causes, genetic, hormonal, enviromental, etc, a clear answer would probably be. "It might play a role or it might not."

Answer 4

Your finger length is determined by genetics not a sex hormone of testosterone.

Answer 5

No, it's not true.
Testosterone as a growth hormone may affect general size of the body but does not affect specific organs.

Levels may vary considerably throughout life, but your fingers don't grow or shrink.