Boys Reach Puberty Two Years Earlier Than in the Past . . . And Some Start to Mature at the Age of Six

Fiona Macrae, Daily Mail (London), October 22, 2012

Boys are hitting puberty up to two years earlier than in the past – with some starting to show the first signs of maturing as young as six, according to doctors.

Although it is well-documented that girls are hitting puberty younger, the study is one of the first to suggest that boys are also growing up earlier.

Data gathered from 4,000 boys across the US revealed that, on average, white and Hispanic boys go through puberty around the age of ten, while the average age is nine for black boys.

Researchers working for the American Academy of Paediatrics said that a similar trend had been noticed in other countries, including the UK.

The doctors who volunteered for the study had examined young male patients for signs of puberty.

Nine per cent of white boys showed some signs of puberty at six, as did almost 20 per cent of black boys and 7 per cent of Hispanics, the AAP’s annual conference heard.

Overall, the average age of the onset of puberty was 18 months earlier than the long-considered figure of 11.5 years for white boys and two years earlier for black children, who had been thought to start developing aged 11.

The reasons for the shift are unclear but experts warned the results could be skewed because the doctors had volunteered to take part, so they might have had a special interest in the topic because they had more patients going through early puberty than most.

Dr William Adelman, an adolescent medicine specialist in the Baltimore area, says the new research is the first to find early, strong physical evidence that boys are maturing earlier. But he added that the study still isn’t proof and said it raises a lot of questions.

Earlier research based on 20-year-old national data also suggested a trend toward early puberty in boys, but it was based on less rigorous information. The new study involved testes measurements in more than 4,000 boys. Enlargement of testes is generally the earliest sign of puberty in boys.

The study was published online Saturday in Pediatrics to coincide with the American Academy of Pediatrics’ national conference in New Orleans.

Dr Neerav Desai, an adolescent medicine specialist at Vanderbilt University in Nashville, said he’s seen a subtle trend toward slightly earlier puberty in boys. He said it’s important for parents and doctors to be aware so they can help children emotionally prepare for the changes that come with puberty.

Doctors generally consider puberty early if it begins before age 8 in girls and before age 9 in boys.

Boys are more likely than girls to have an underlying physical cause for early puberty. But it’s likely that most, if not all, of the boys in the study were free of any conditions that might explain the results, said lead author Marcia Herman-Giddens, a researcher at the University of North Carolina in Chapel Hill.

Problems such as thyroid abnormalities and brain tumors have been linked to early puberty. But boys with chronic medical conditions or who were using medicines that could affect puberty were excluded from the research.

In girls, early puberty has been linked with increased chances for developing breast cancer, but whether it poses health risks for boys is uncertain. Some scientists think early testes development may increase the risk for testicular cancer, but a recent research analysis found no such link.

‘If it’s true that boys are starting puberty younger, it’s not clear that means anything negative or has any implications for long-term,’ said Adelman, a member of the American Academy of Pediatrics’ committee on adolescence.

For the new study, researchers recruited pediatricians in 41 states who participate in the academy’s office-based research network. Doctors asked parents and boys aged 6 to 16 to take part during regular checkups. The visits took place between 2005 and 2010.

Half of the boys were white. The rest were almost evenly divided among blacks and Hispanics.

On average, white boys started puberty at age 10, a year and a half earlier than what has long been considered the normal average. For black boys, the average age of 9 was about two years earlier than in previous research. Among Hispanics, age 10 was similar to previous research that only involved Mexican-American boys. The new study included boys from other Hispanic backgrounds.

Testes enlargement was seen at age 6 in 9 percent of white boys, almost 20 percent of blacks and 7 percent of Hispanics.

Pubic hair growth, another early sign of puberty, started about a year after testes enlargement in all groups but still earlier than previously thought.

In girls, breast development is the first sign, and recent research suggested that it starts at age 7 in about 10 per cent of white girls, 23 per cent of blacks and 15 per cent of Hispanics. That’s substantially higher than rates reported more than a decade ago.

But some experts have questioned methods used in studies in girls, noting that the age when girls start menstruating has not changed much and remains around age 12 on average.

Dr Dianne Deplewski, a pediatric endocrinologist at the University of Chicago, has not seen any increase in boys referred to her for signs of early puberty. She said it’s possible that the new study results were skewed by families who brought their boys to the doctor because they already had concerns about their health.

The study had other limitations. Testes were measured just once, and doctors weren’t randomly recruited but volunteered to participate. That means it’s possible that those with early maturing patients were overly represented, but Herman-Giddens said it’s unlikely boys in the study were different from those in the general U.S. population.

She said the research methods weren’t perfect but that they’re the best to date. She also stressed that the results shouldn’t be used to establish a ‘new normal’ for the start of puberty in boys.

‘Just because this is happening doesn’t mean this is normal or healthy,’ the researcher said.

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  • Puggg

    The main reason for the overall earlier puberty for all races is better nutrition.

  • WmarkW

    Blacks are born more physically mature than whites, and remain so throughout childhood, reaching puberty 1-1.5 years sooner.  This is the key to understanding claims often made about “our early-childhood education interventions start well, with blacks scoring nearly like whites up to age 9, but by 16 the achievements diverge due to cultural factors.”  

    WRONG.  A 9-year old black is closer to their ultimate development than a white is at that age, and quickly falls behind as the white continues maturing.

    • MerlinV

      Yes, my understanding is that black IQ peaks at age nine.

    • Bon, From the Land of Babble

      Yes.  And at no time are blacks intellectually superior to Whites:

      The late, great Professor Rushton wrote:

      The Peabody is a specialized verbal IQ test for the very young (down to age 2). It’s scored on the same mean = 100 and standard deviation = 15 scale as better-known IQ tests like the Wechsler, which the Peabody correlates with. And it shows that, among preschoolers, there exists the same one standard deviation, 15-point white-black average gap found in IQ among adults.

      In other words, the exact same IQ deficit relative to whites that is found among black adults and older children, exists among black pre-schoolers as well.

      Rushton and Jensen write in Thirty Years of Research on Race Difference in Cognitive Ability (2005):

      Racial-group differences in IQ appear early. For example, the Black and the
      White 3-year-old children in the standardization sample of the Stanford–Binet IV
      show a 1 standard deviation mean difference after being matched on gender, birth
      order, and maternal education. Similarly, Black and the White 21⁄2- to 6-year-old children in the U.S. standardization sample of the Differential Aptitude Scale have a 1 standard deviation mean difference.

      The size of the average Black–White difference does not change significantly over the developmental period from 3 years of age and beyond.

      Pass it on to anyone who claims that blacks are either the same or cognitively superior to Whites up to a certain age. It’s not true.


  • MekongDelta69

    The earlier down the evolutionary chain you are, the earlier you’re going to reach puberty.

    • Well I don’t know if earlier is accurate. Blacks have been around longer than caucasoids. But a more r sub-species will mature much faster than a more K sub-species.

  • Integration in schools means that blacks, in general, are larger and more physically mature than non-blacks and will, in general: beat non-blacks in most sports, and be the sports stars/”heroes” and thus be more likely to be the Big Man on Campus, attracting non-black girls’ attention; and easily intimidate, threaten, and beat up non-blacks damaging non-black guys’ self-confidence.

    • 1911ThePunisher45

      Thats true, self-confidence is a hard thing to get back once you’ve lost it.

    • MerlinV

      Not to mention that many blacks are in their twenties in high school due to being held back. At my HS we had an undefeated black basketball team. Later it was discovered that four of the five starters were in their twenties. Grown men playing against teenagers.

  • Early sexual maturation is a reproduction strategy that seems to favor blacks.

  • Jed Sant Devi

    Diversity is very fast breeding, thanks to White taxpayers who fund the horrors with our labor and money.  We work so hard and have so little left over, that we are reduced to making one or two children, or none, because our profits from White privilege go to weakening global Whiteness.

    We will collapse because of our own generosity and for succumbing to the failures of Democracy.

    As a White Christ Christian and member in good standing in the Church of Jed, I hate to report that the future is looking like more of a victory for Nietzsche than for St. Paul.If Christians don’t come together and decide as a mass of organized unity that White Humanity deserves to segregate itself away from that which will kill it off, then even Jesus will wonder “what the heck?”.The capacity for Whites to believe that White is bad is the bafflement of Eternity.   We don’t resist- we succumb. What will be the fate of such a race?

  • Puberty. Physical, but not mental.

  • IstvanIN

    Generally speaking, the sooner, or quicker, an animal matures the less intelligent it is.  The smarter mammals seem to have a longer “childhood”. Humans are mammals.  Think about it.

  • MerlinV

    I’ve heard of a study done in the UK that found black boys were attempting sex with girls at age five and making sexual advances on much older females by age six.

  • MerlinV

    Blacks share a substantial DNA profile with Mountain Gorilla. Definitely more primitive than other races with a high instance of primate alelle commonality.

    • IstvanIN

       I thought that was just blacks from the general area of Nigeria?

  • puffdaddy

    Commenters on the story in the Wall Street Journal seem to think that the disparity is because whites have access to organic milk, and blacks don’t.  I kid you not.

  • libertarian1234

    “Black boys start a year earlier than whites and Hispanics.”

    I’m not sure I believe them on that, since their studies are usually manipulated some way.

    I have absolutely no experience or education on the subject, but I would have guessed blacks begin sexual maturity a couple of years earlier than whites.


    • tickyul

      UGH….maybe that is why the scumstream media likes to pair the cute little white girl with the bleeechy black boy…..usually holding hands, playing together or some other sickness. Send some sort of sick message about the prowess of young black boys.

  • Snowhitey

    Early puberty is a sign that something is dreadfully wrong!

    Part of being a race realist is looking out for your own race (the extended family).  Buy organic.  I cannot stress this enough.  The garbage they peddle as fit for consumption, and the methods in which it is grown or produced, is nothing short of crimes against humanity.

    Again, early puberty is a sign that something is dreadfully wrong.  It is NOT NORMAL.  You should not be looking to buy cheap food when you don’t even wince at the price of material things you are not putting in your body.  Always remember, you are what you eat!!!  Cheap food is cheap for a reason.

    Buy organic and avoid GMO’s/GME’s.

    • Michael C. Scott

      Also, don’t heat anything up in plastic, even in a microwave oven, unless the plastic container expressly says “ovenable”.  Things like phthalate plasticizers can leach out of plastics at elevated temperatures, especially when the food being heated is oily, like chile con carne.

    • elitist

      if we had a real government in the first place (we just have an oligarchy based on corporate rule), they would be studying children raised on organic food without growth hormones to see whether they were reaching puberty at a normal rate.

      Given the steady diet of non-food “foods”, pharmaceuticals, chemical pollutants, video games, flashing lights, and inactivity, it is a miracle children are as normal as they are.

      another place where the right/left paradigm breaks down:

      If I accept racial difference, I have to deny climate change… If I’m against uncontrolled immigration, I must accept a food system designed to turn us into obese, diabetic, cancer ridden mental retards with ADD??

      the corporate controlled food system is a chemical waste dump.

  • Guest

    Consider the fact that growth hormones are given to farm animals artificially. It would then be the modern diet that is changing things in this area. I don’t think that this is quite so common in Europe.

  • Actually, I thinks he means blacks are “less evolved” than whites or east asians. One needs to be careful when saying this. While blacks do differ in intelligence, tolerance for carbohydrates, aggression, etc., they are simply more adapted for their specific environment. They are not inherently inferior for not being well suited for the techno-industrial world, they just evolved traits not favorable in such an a setting. To claim blacks are “less evovled” is to ascribe subjective and moral judgements to nature and biology.

  • elitist

    many posters here are confusing two separate issues:

    1) the races hit puberty at different rates, this is an established fact, is nothing new;

    2) children are arriving at puberty earlier, probably due to a steady diet of hormones, chemicals, antibiotics, plastics, etc.

    1) is simply evidence for racial difference.

    2) is an argument for radically reforming our corporate run food system.

  • It hasn’t been mentioned but let me throw this one out. Some kids are more saturated with sexual talk, sexual situations and witnessing sex acts either at home, porno material or in the media. I have heard from school teachers about 5 and 6 yr old blacks acting out sexual situations in class, such as oral sex and bumping and grinding. I believe they witness sex acts at home where the parents show no interst in hiding it from the kids and couldn’t care less. It my stimulate something in the pituitary gland. Probaby can’t be proved but sounds like a reasonable theory.

  • puffdaddy

    Yes according to NYC mayor Michael Bloomberg, it is – so he has decided hospitals in NY can’t give formula to new moms.  Without really saying, of course, that the majority of women who do not breastfeed happen to be blacks and poor whites, and poor people in general.  But the entire argument about food is fairly ridiculous anyway because it has yet to truly be measured, so making assumptions about milk or meat or organic vs nonorganic is fruitless (no pun intended).

  • But you are presuming that higher IQ and like is inherently good. While this may be true in Western Society it is not true in general. Organisms with smaller brains need much fewer resources to survive. Does that make them more evolved or less evolved? Or does it depend on the environment? I don’t disagree with your comment. I’m just trying to clarify what I mean.

  • Puggg

    One of the best ever comments on AmRen.  I’m saving it.

    I have heard the theory about starvation and early puberty.  That could actually be the best explanation why blacks are starting in on puberty so soon, because while they’re not lacking for calories, they are for real nutrition.  Also, do you think it’s possible that the early puberty is an involuntary adoption of “r” in the r-K spectrum (even more so than they already are) because their brains are subconsciously aware of all the violence they will encounter (because they cause it)?

  • Bon, From the Land of Babble

    Unfermented Soy products too:

    You should NEVER feed your baby soy based formula-doing so gives him an equivalent of five birth control pills’ worth of estrogen every day…Soy infant formula puts your baby’s health at risk. 

    Nearly 20 percent of U.S. infants are now fed soy formula, but the estrogens in soy can irreversibly harm your baby’s sexual development and reproductive health. Infants fed soy formula take in an estimated five birth control pills’ worth of estrogen every day. Infants fed soy formula have up to 20,000 times the amount of estrogen in circulation as those fed other formulas.


    *Soy has many potent hormones that can wreak havoc with your health. Women are particularly vulnerable to soy phytoestrogens and isoflavones as they are potent goitrogens leading to impaired thyroid health, fatigue and infertility

    *Ninety one percent of the soy grown in the United States is genetically engineered to impart resistance to the toxic herbicide Roundup, with which it’s heavily sprayed.

    Dangers of unfermented soy articles here:

    What about Asians who consume soy based products as a dietary staple?

    For centuries, Asian people have been consuming fermented soy products such as natto, tempeh, and soy sauce, and enjoying the health benefits. Fermented soy does not wreak havoc on your body like unfermented soy products do.  Unlike the Asian culture, where people eat small amounts of whole non-GMO soybean products, western food processors separate the soybean into two golden commodities—protein and oil…. there is nothing natural or safe about these products.


  • William Allingham

    Well, i have my doubts because why hispanics that are less intelligent, according to these tests develop later than whites? 
    i think that because of the randomness of genes selection no group can be more adapted in all levels but in general we can say that even whites lack some abilities blacks or hispanics may have; the abilities that whites have are more useful for an advanced society.We could easily live without B.B. king or Jimi Hendrixs but we could not have our societies without Edison, leeuwenhoek or the geniuses that modeled the western world.Overall whites are more advanced even physically but there are some genes less useful that made their way can be very good at singing, running whatever you want but in a computer programmers office that would serve for nothing, and someone with ability for computers even if he’s very bad in everything else and its his only ability he will do better in that job.

  • Up to my neck in CA

    His reserch on Aspartame is an eye-opener! Diet Soda is BAD!

    • Michael C. Scott

      Fluorided water does make teeth and bones stronger.  The mineral content is calcium phosphate and calcium fluoride, usually with traces of strontium in place of some of the calcium.  Well water is usually heavily mineralized, like in much of California; you have a lot of limestone there.

      We’re stupid in Colorado; we get our drinking water from snowmelt that sometimes runs through old piles of mine tailings.  It tastes good.

      Strontium deposits in human bones tell archeologists a lot about what a skeleton they are examining ate while it was a living person.  That was never my field of chemistry, but I think lots of strontium means lots of salt-water fish and shellfish.

  • Puggg

    My theory was that everyone has better nutrition, which did explain why boys of all races are starting puberty earlier. However, as you can read, other comments in this story refute that. Keeping variables equal, blacks would start puberty earlier than whites. I wasn’t saying that blacks had better nutrition than whites, I was saying that both blacks and whites were improving their nutrition, which was shifting the puberty start age earlier for both groups, all the while blacks would start earlier than whites. But the nutrition theory is out the window: Lack of real nutrition and hormones and exposure to external stimuli are better explanations.

  • Bon, From the Land of Babble

    Ditto for cow’s milk.  


  • Bon, From the Land of Babble

    Dr. Mercola and Dr. Blaylock of are both great, they often work together — I can’t link any of Dr. Blaylock’s articles, unfortunately, because they’re behind a subscription wall.

    Yes, wake up all White People.


  • Yes, I buy into scientific fact. Doesn’t mean we’re all equal. 

  • Triarius

    More access to food in general and body fat for girls make them start younger. The difference in races is that blacks evolved to live not as long. This is the same reason for sickle cell, better to ward off malaria and shave a few years off of your life than die of disease tomorrow.

    Because of this blacks will always mature faster on a general level from an evolutionary need to.

  • Bon, From the Land of Babble

    My city water is highly mineralized, heavily chlorinated and loaded with fluoride — you can’t even use it for fish tanks!!

    I own and use the Waterwise for drinking water -it wasn’t cheap but the amount of gunk leftover after the tap water has been distilled makes the price entirely worth it. A “natural” water softener takes care of most of the minerals in the rest of the house. The water is SO bad here it will ruin your clothes and dishes, kill your plants and destroy your household appliances.