Evening paper of river of Zhang Miao money today
The leaf of a press edits Hangzhou to be made up with the United States recently to a piece cover graph had have a difference of opinions. Blame is shouldered in flocculus editorial apply to elementary school originally on the schoolbook of 3 grade student, the schoolgirl that the United States makes up a picture to go out can see just the bosom of development.
The cover that two people argue pursues
"Elementary school 3 grade, doesn't bosom still have development? This piece of graph had better change. " flocculus found out what published 1990 even " encyclopedia of Chinese teenager children " , appear inside with age the schoolgirl's illustration, bosom is flatly.
And the United States invents the definite idea that has his however: "Present pupil, development is quite early, so the picture also is no problem. So the picture also is no problem..
Published 1990 " encyclopedia of Chinese teenager children " medium illustration
Does the schoolgirl of 3 grade have elementary school after all development?
The controversy of these two married men does not have a law to give out final conclusion, growing nevertheless development expert looks, the answer is very clear still: Elementary school 3 grade already development is common phenomenon, this and ten have before New Year very big different.
"In my consulting room, have about the same the ailment person of 1/8, it is 10 years old of right-and-left girls, mother fears the daughter shifts to an earlier date development, to me this makes an inspection, final discovery is no problem completely. " Zhejiang university college of medicine is accessary paediatrics director Liang Li says the first hospital, "Mom use him in those days growth level measures present child, the level is already actually different. The level is already actually different..
The closest example is two days ago, liang Li is in in consulting room when the Xiaohui that sees 12 years old, her mom one face angst, "At the beginning of the daughter one, there still is not forthcoming month classics now, but her bosom already development 3 years two. " Xiaohui's mom says, she fears epiphysis line of the child has closed, height can stop to be in 1.55 meters only.
A series of after the examination, liang Li eliminated small Hui Zaisheng to grow the problem of development respect, "Epiphysis line also did not close, you had been at ease. " she is comforting Xiaohui's mom.
In the process of the examination, liang Li discovers what muddled muddled knows the problem such as development of menarche, breast Xiaohui is right, "Do you have attend sexual education class? " Liang Li asks.
"Some, scientific subject when have had said, male woman student attends class apart, teacher say a few words word, schoolgirls are given out ' well ' sound, everybody is very curious, a bit shy also. " small favor say.
"The one ability at the beginning of schoolgirls begins to attend sexual education class, some are late, should shift to an earlier date 9 years again. " Liang Li plaints.
Why so say? Liang Li broke up in recent years the research data of age of development of domestic and international sex, discover green development age is in the time of a century in the past the trend that presents to shift to an earlier date ceaselessly, the age of mammary gland development still is in ahead of schedule, and the trend that girl menarche shifts to an earlier date has changed later in 20 centuries middle period delay or backwater.
In other words, present mom do not have a law to use his in those days growth level and oneself daughter makes contrast, the time of two acting people, had allowed mammary gland growth this thing had very big change.
Can see this trend from old research actually.
19 centuries come 20 centuries metaphase, the menarche age of the United States and girl of Western Europe country comes 14 years old ahead of schedule from 17 years old. The trend that after 20 centuries middle period adolescent development shifts to an earlier date ceaselessly already slow down even backwater. If the country such as England, Switzerland and Belgium is turned over,moved 0.14 years old after that ～ is 0.03 years old, and the girl menarche age that 1973 ～ of American investigated 2001 falls very small, fall from 12.8 years old to 12.5 years old.
The national investigation of 12 years old of girls shows the 3 ～ that covered 34 states of American 1997, white man mammary gland is average development age (1.82) of 9.96 ± year old, black (8.87 ± 1.93) year old.
Is Chinese circumstance what kind of?
"Our country with a vast territory, the environment of different district, climate condition and economy developed degree differs very far. " Liang Li says, the investigation of local district shows, total trend is in the adolescent development of Chinese girl ahead of schedule, but speed puts delay.
For instance the age of germinate of mammary gland of findings report girl of Shanghai area was 10.2 ± 1.8 years old 2002, than half an year shifting to an earlier date only 20 years ago.
Overall, the city zone mixed the age of germinate of breast of epidemiology investigation female of Beijing 2004 suburb (county) it is 9.5 ± 1.2 years old respectively, 9.4 ± are mixed 1.1 years old 9.6 ± is 1.2 years old; The city zone antedates suburb (prefectural) .
And 1962, 1985, 1991, mixed 2000 time of menarche of menstruation of Beijing area girl was 14.16 years old respectively 2004, 12.62 years old, 12.5 years old, 12.14 years old mix 11.9 years old.
"The menstrual menarche of the northwest area girl that investigation of girl of provincial capital city shows economy and standard of living are backward develops than economy the girl of the area is late. " Liang Li says.
Home's newest research comes from Yu Liangli to be participated in personally " sexual development existing state of affairs studies Chinese children adolescent " , this research that involves 18707 children discovers, the girl that 7 years old of groups have 2.56% appears mammary development, 8 years old of groups and 9 years old of scale of group breast development are respectively 2.91% with 10.77% .
The scale of development of breast of 10 years old of groups approachs an in part.
Farewell is made up to responsibility editor and beauty whether to appear to 3 grade schoolgirl in the discussion of bosom, namely girl of 10 years old appears bosom development is a business that does not pass normally again.
Why is the mammary gland development of the girl in ahead of schedule? Look in Liang Li, this and environment, food is concerned to the influence of estrogen, "Our research discovers sexual precocity incidence of a disease is reached come on the age exists in different area certain difference.
And what parents care more is, children development is earlier and earlier, can influential to height? After all sexual precocity can let grow development shifts to an earlier date, and give out height latent capacity early.
"This parents need not worry. " Liang Li says, "Look from present group height data, the height generation of children is taller than generation. " Liang Li tells Qian Jiang evening paper reporter, mammary gland development is not met on behalf of epiphysis line early, close, "Grow development has growth to compensate a mechanism, development shifts to an earlier date appropriately slightly a bit earlier, height also can have reflect accordingly, not be pathology sexual precocity won't affect height. Not be pathology sexual precocity won't affect height..
