Question

Salman has more testosterone to reproduce new infants at a very old age? Is it possible?​

Answer 1

Answer:

According to the ranges I found it lists anything below 9ng/dl as normal for a 9 year old. Looking at the minimums for the age group above and below 9 year olds it lists the minimums as 2-3 ng/dl so your son may be a little on the low side.

I'm not extremely familiar with testosterone interactions in children, but in adults being on the low side of the range can still present symptoms. The ranges are developed by looking at where 95% of the population lies.

It's based on a false assumption that 95% of the population is perfectly healthy, which isn't always the case. Getting close to the bottom of the range may present symptoms of low T as well, however many doctors won't acknowledge this.