Jia Jia, who is only 7 years old, is 1.32 meters tall, not only surpassing her classmates, but is even taller than fifth-grade students. Jia Jia's mother was worried and afraid that she would mature prematurely, so she took her to see the doctor.
How does puberty start
Hypothalamus-pituitary-godendrons (testes or ovaries) are members of the Youth Development Project team. They divide the work and cooperate with each other and restrict each other.
The hypothalamus is hidden in our brain, above the pituitary . At the beginning of youth development, it is "authorized and approved" by the brain center, and the hypothalamus turns on the "switch" for youth development. It "hiberns in the day and comes out at night". Whenever the child falls asleep, he secretes gonadotropin-releasing hormone (GnRH) secretly and intermittently. With the progress of youth development, the function of the hypothalamus becomes stronger and GnRH is secreted day and night.
This GnRH command acts on the pituitary gland that is only the size of a pea, stimulating its secretion of gonadotropin (luteinizing LH and follicle stimulating hormone FSH) to convey to the gonads (testicles, ovaries). The gonads that receive the task immediately send out sex hormones (androgen T or estrogen E2) that are used to show off to start work, causing the child to show signs of development.
Precocious puberty, who is better than
If there is a lesion in the brain center or the hypothalamus is dysfunctional, the hypothalamus can accidentally increase the secretion and release of GnRH in advance, transmit false news to the pituitary gland, causing the whole mobilization, and spring is coming early. This precocious puberty that relies on GnRH is called central (true) precocious puberty.
If it is caused by other factors, it is called non-GnRH-dependent precocious puberty, which is divided into peripheral precocious puberty and partial precocious puberty. Peripheral (pseudo-sexual) precocious puberty, such as in the body's gonads, adrenal , tumors with "illegal copying and selling" sex hormones, or taking more foods and drugs containing sex hormones. As long as the amount of neutral hormones in the blood reaches a certain level, it can develop creatively "with your own hands". Moreover, foreign monks can recite scriptures, and these sex hormones in turn will inhibit the secretory function of the hypothalamus and pituitary gland.
Partial precocious puberty is mostly simple early development of breasts without the development of other sexual disorders. It is mainly related to the fact that the negative feedback regulation of the stable hypothalamus in children has not yet been established, and the temporary increase in estrogen secreted by the ovaries and follicle stimulating hormone secreted by the pituitary gland.
How to find signs of puberty
* The standard height and weight of children aged 2 to 12 can be roughly calculated using the following formula: Weight (kg) = age × 2 + 7
(or 8); Height (cm) = age × 5 + 75. If the actual measured data exceeds or is below the standard value by 10%, it is abnormal.
* Children's rise to a higher level, significantly higher than their peers, may be a signal. After the age of 3, your height will increase by more than 6 to 7 cm every year. Be vigilant.
* Children's appetite has become particularly strong and their weight has increased significantly. It should be noted that about 30 kilograms are the critical weight for puberty.
* Breast development starts with the growth of small nodules, and this detail is the most important; if a boy's testicles reach the size of an olive (about 4 ml in volume), it means he is about to turn into a man.
Adolescent sexual development rules
Adolescent development order for girls is: breast development, pubic hair, external genitals changes, menstrual period, Axillary hair . These changes are the second characteristic of women. The whole process takes about 1.5 to 6 years.
High-sexuality changes in boys are first manifested as an increase in testicle volume, followed by thickening of penis, growth of pubic hair, low voice, and growth of beards. The whole process takes more than 5 years.
Different puberty, normal puberty development, and delayed puberty
Girls are 8 to 13 years old, and boys start to develop at the age of 9 to 14, which is normal puberty development. During this period of time, a secondary sexual characteristic appears and height will increase sharply.
Precocious puberty and delayed puberty are diseases of abnormal puberty. They not only affect children's sexual development, but also often cause their body to be shorter than normal people after adulthood.
Currently, girls have secondary sexual characteristics before the age of 8, boys have before the age of 9, or girls have menstruation before the age of 10, which can be diagnosed as precocious puberty. Although it is temporarily taller than children of the same age, it is shorter than normal people when they are adults. About half of the typical central precocious puberty children end up with less than 1.5 meters in height.
Adolescent development delay means that girls have no secondary sexual characteristics after the age of 13 and boys have 14. Due to hypogonadal function, the development of reproductive organs and sexual characteristics is dysplasia, which affects fertility. Most of them are also significantly shorter after adulthood. #premature puberty#
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