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I could mention that until rather recently children were wed well below the current definition of adult, so, was pre/early-teen pairing (marriage) part of the human evolutionary process only to removed by (wildly variant religious) concepts of ethics and morality?
3. Chuck the soy products as even organic soy acts as a plant-estrogen that interferes with the body’s natural hormones. ... Soy formula should absolutely be avoided for babies.
Meat, animal protein, and soymilk (soya milk) can affect premature breast development in girls.
More research should be done on soy isoflavones before feeding soy infant formulas to babies.
Preliminary studies are indicating that children given soy formula go through puberty much earlier than children who were not fed soy products.
“While evidence from some studies have raised questions as to whether BPA may be associated with a variety of health effects, there remain serious questions about these studies, particularly as they relate to humans,” the agency said.
The FDA still maintains that there is “some concern” about the effect of BPA on children, and the government is spending $30 million to study the chemical’s effect on humans.
BPA changes hormones that control puberty, ovulation.
More evidence from lab rat studies shows the plastic compound bisphenol A can permanently affect reproductive hormones, resulting in early puberty and odd ovulation patterns.
Hormones vital for controlling reproduction were permanently changed in female rats exposed to bisphenol A (BPA) early in life, reports a recent study from Argentina.
The study is the first to find long lasting hormonal changes when exposure occurs after birth, during critical times of development. Past studies have found similar effects when exposures occur before birth, during prenatal development.
The findings show again that BPA can affect fertility in mammals. Of the two levels tested in this study, the higher dose had lasting negative effects on the signaling hormones that control female reproductive cycles through life. This dose is slightly above what US federal agencies consider as a reference -- or a safe -- dose for humans.
The environmental effects of these chemicals has been well-established: pseudo-hermaphrodite polar bears with penis-like stumps, panthers with atrophied testicles, _hermaphroditic deformities in frogs, and male trout with eggs growing in their testes have all been documented as the probable result of endocrine-disrupting chemicals in the environment. Many scientists believe that wildlife provides early warnings of effects produced by endocrine disruptors, which may as yet be unobserved in humans.
Originally posted by PuterMan
We know that girls who develop ahead of their peers tend to have lower self-esteem, more depression and more eating disorders. They start drinking and lose their virginity sooner. They have more sexual partners and more sexually transmitted diseases. “You can almost predict it” — that early maturing teenagers will take part in more high-risk behaviors, says Tonya Chaffee, associate clinical professor of pediatrics at University of California, San Francisco
Most girls start to menstruate between ages 10 and 15 years. The average age is 12, but every girl's body has its own schedule.
Although there's no one right age for a girl to get her period, there are some clues that menstruation will start soon. Typically, a girl gets her period about 2 years after her breasts start to develop. Another sign is vaginal discharge fluid (sort of like mucus) that a girl might see or feel on her underwear. This discharge usually begins about 6 months to a year before a girl gets her first period.
What is recombinant bovine somatotropin (rBST), also known as recombinant bovine growth hormone (rBGH)?
Recombinant bovine growth hormone (also known as rBGH or rBST) is a genetically engineered drug produced by the Monsanto Corporation. It is injected into dairy cows to induce them to increase milk production, typically by 5-15%. It's estimated that 15-20% of the cows in the United States are injected with this hormone. It was approved by the FDA in 1993.
Why should we be concerned about rBGH / rBST? Increased cancer risk: When rBST is injected into a cow, it elevates levels of another powerful growth hormone, IGF-1, which is present in both cows and humans. IGF-1 is a necessary hormone, but in excessive amounts, it has been linked in hundreds of studies to an increase in breast, prostate, colon, lung and other cancers in humans.
As a society we should be able to do something about both aspects of this problem. Those of you who are as ancient as me will remember that girls did not really start maturing until around 13 or later, and boys as late as 15 or 16.
The average age at which the onset of puberty occurs has dropped significantly since the 1840s. In
Norway, girls born in 1840 had their menarche at an average age of 17 years. In France, the average in 1840 was 15.3 years. In England, the average in 1840 was 16.5 years. In Japan the decline happened later and was then more rapid: from 1945 to 1975 in Japan there was a drop of 11 months per decade.
A 2006 study in Denmark found that puberty, as evidenced by breast development, started at an average age of 9 years and 10 months, a year earlier than when a similar study was done in 1991.
Scientists believe the phenomenon could be linked to obesity or exposure to chemicals in the food chain, and is putting girls at greater long-term risk of breast cancer.