Autism. Puberty can be thought of as a river being held in check by a dam. Negative or inhibitory impulses hold back puberty from starting early. Any "crack" in the dam can bring on puberty earlier by canceling these inhibitory impulses. Tumors, trauma, seizures, or even neuro chemical imballances may do this.
Autism & Puberty. The development of autism is usually seen prior to the age of two years old when the brain is most "plastic" and vulnerable to toxins in the environment. The combo of genetic predispositions and an increased load of toxins becomes a threat for these young vulnerble children. There is no correlation of autism and onset of puberty.