@rangerrebewI can attest to the truth of this study. Years ago, I had lower back pain. My doctor sent me to a doctor who would put shots in the lower back to help get rid of lower back pain. It was a series of shots, had to go back several times. They would put me to sleep to get the shots. It wasn't working. That doc said he needed to do a testosterone count as people with too low a count would mean it was less likely for the shots to work. He took blood and had it analyzed.
When I went back, he said I had the highest testosterone count a woman could have and still be a woman. My ring finger is longer than my index finger which is what this article says - a longer ring finger means more testosterone in the development of the child.
Another medical observation:
I had a right knee problem. I was sent for an MRI on right knee. Went to get that, the medical woman put my knee inside the machine. Then, she said she had to readjust it. She said, "Were you a runner?" I said yes, both in high school and college had got a medal in college for winning the 50 yard dash and the record had not been broken. She said she knew because the length of my leg from the knee down was longer than normal people. I certainly did not know that. If you are a runner and you constantly win, your legs are likely to be longer than others from the knee down.