It's also time to start talking about the changes that will occur in puberty.
In this scenario the result to date could be increased diagnoses of ASD for males over females in puberty.
The natural rounding out of the body that happens in puberty clashes with the unnatural slimness girls see in the culture around them.
Researchers have found signs of puberty in American boys up to two years earlier than previously reported age 9 on average for blacks, 10 for whites and Hispanics (puberty is considered early in boys if it occurs by age 9 or earlier) .
FORBES: Study Shows that Early Puberty is Now Affecting Boys, Just Like Girls
Scientists believe the controversial pesticide DDT is responsible for premature puberty in girls in developing countries.
The symptoms of ADD disappear during puberty in 30 to 40 percent of children, and the symptoms stay gone.
By 1964, when I was negotiating puberty in the chill deeps of the Cold War, history itself had become the Atomic Disintegrator.
"It looks like we have found a key genetic gatekeeper of puberty in mice and men, " said Dr William Crowley Jr, chief of the reproductive endocrine unit and one of those involved in the study.
Since then, over 100 scientific studies have linked low doses of BPA to prostate and breast cancer, reproductive abnormalities, accelerated puberty in females, low sperm count in males, neurological effects similar to ADHD, diabetes and even obesity.
The idea of gender segregation in schools, particularly from the onset of puberty, is widely accepted in conservative Palestinian society.
And so the boys carried on into puberty, in a colourful muddle of hearsay and experiment.
Such periods include: in utero exposure, puberty, and the period between menarche and a first full-term pregnancy.
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In contrast, girls appear to be overrepresented in disorders that begin after puberty such as depression and anxiety.
Some forms of chemotherapy also affect a child's progress through puberty, which in turn might result in short stature, Kadan-Lottick said.
Critics of the use of biocides say they may be responsible for various conditions including a rise in cancer, and early puberty amongst girls.
Professor Peter Clayton, a paediatric endocrinologist at the University of Manchester, told the BBC News website it was still unclear what factors might be driving a reduction in the age of onset of puberty.
Boys are more likely than girls to have an underlying physical cause for early puberty, but boys in this study were most likely free of any physical conditions that might explain the results, said lead author Marcia Herman-Giddens, a researcher at the University of North Carolina in Chapel Hill.
FORBES: Study Shows that Early Puberty is Now Affecting Boys, Just Like Girls
In 1990 the first signs of precocious puberty were around the age of eight for girls - the whole process taking two years to complete.
But these possible factors do not explain why someone as young as Taylor, who is not overweight and did not hit puberty early got breast cancer in her teens.
Ryuzo Yanagimachi, a biologist at the University of Hawaii, found that when he cloned a certain strain of mice prone to have diabetes, the clones would look normal at birth, but upon reaching puberty -- which, in mice, is after eight weeks -- they gained weight.
In particular the group is concerned that children will not be taught about sexual reproduction and puberty early enough - and that some will already be experiencing changes in their bodies before they have been taught about them.
BBC: Curriculum plan 'waters down sex education' experts warn
They found that the gene that codes for GPR54 was mutated in all those who had failed to reach puberty.
Early detection in boys can help prevent problems from delayed puberty.
But the album failed to find the following of the duo's debut, in large part because the boys had hit puberty and they were marketed with a tougher image.
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"These findings define a new drug target with wide potential for therapeutic intervention in conditions such as hormonal-dependent cancer, abnormal puberty and control of fertility, " said Dr Samuel Aparicio of Paradigm Therapeutics.
Puberty arrives earlier, and the motivational system kicks in earlier too.
Anterior cruciate ligament (ACL) injuries are very common in young athletes, especially in women because of structural differences in their bodies, which tend to begin when they reach puberty.
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In various studies phthalates have been linked to birth defects, infertility, early puberty, asthma, ADHD, obesity, diabetes, and cancer.
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In addition, sometimes the child learns how to compensate so well for his ADD during puberty that it looks as if the ADD has gone away.
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