Puberty in Girls

Adolescence is a series of events that have experienced physical changes that bring about physical characteristics and fertility of adults. These physical changes are regulated by changes in hormone levels produced by pituitary lutein and follicle stimulating hormone. These hormonal levels are high at birth, but they will decline and will remain low for months to adolescence. In early puberty, the levels of luteinizing hormone and follicle-stimulating hormone are elevated, stimulating sex hormone production. Physical changes, including breast, ovary, uterus and vaginal maturation, occur when the sex hormone (mainly estrogen) levels rise. Normally these changes occur during puberty, leading to sexual maturity.

Nutrition and general health: In the United States today's adolescent begins three years ago a century ago. The reason may include nutritional improvement and general health

The first change in puberty is usually the beginning of breast development (breast germination). Among girls living in the United States, this change usually occurs around 8 to 13 years old. Shortly thereafter, pubic hair and armpit hair started to grow.

The sudden growth increase associated with puberty usually begins when pubic hair and armpit hair begins to grow. The growth rate of puberty (before menstruation) is relatively fast, reaching a peak at about 12 years old. Then the growth rate will be considerably slower, usually between 14 and 16 years old

The interval from breast germination to the first menstrual period (menarche) is usually 2 to 3 years. In the United States, the average age of girls is nearly 13 years, but there are various ranges (usually 10 to 16 years old) due to various factors. Menstrual cycle is usually irregular at first, it may take up to 5 years to become everyday

In adolescence, the girl's body shape also changes, the proportion of body fat increases and accumulates in the buttocks and thighs.

During adolescence, sexual development occurs in a series of orders. However, when changes begin, the rate at which changes occur will vary from person to person. The girl, adolescent begins 8 1/2 to 10 years old and lasts about 4 years. The chart shows the typical order and normal developmental range of sexual development milestones of girls and boys.

In the case of endocrinologists, girls before puberty are divided into two camps. A girl with a diagnosable disease such as central precocity and a girl who develops early in the normal curve. However, the boundaries between the groups are blurred. Louise Greenspan, a pediatric endocrinologist who is a coauthor of a pediatric thesis in August 2010, said one morning at her Kaiser Permanente office in San, according to the following statement: Gap "" Francisco: Some tools that can help to distinguish between so-called "normal" puberty and "premature" puberty are bone age X-rays. To illustrate how they work, Greenspan launched a beautiful old book, Greulich and Pyle's "radiation map of hand and wrist bone development". And it is standard text for pediatric endocrinologists. X-ray photos of one hand are displayed on each page, and "Bone age" is displayed. The smallest hand is from a newly born baby, the oldest is an adult woman.

Gonadotropic hormone - dependent early puberty. This form of precocious puberty, also known as central precocious puberty, is the most common and affects most girls with this disease and half of the boys with this disease. Puberty is caused by premature secretion of gonadotropic hormone, the hormone responsible for puberty. Researchers believe that the prematurity of the hypothalamus - pituitary - ovarian axis may cause girls to have this disease. However, in most cases, the early cause of gonadotropin hormone secretion has not been discovered.

The early puberty abnormality is called precocious puberty. This was characterized by the early development of sexual characteristics of girls aged 8 and older, most of the boys before child's age grew very early at the beginning, but also completed growth reaching complete inheritance. Elevated likelihood Early adolescence and sexual development may be caused by tumor or ovarian, adrenal, pituitary or brain growth. Other causes include central nervous system abnormalities, family history, or rare hereditary syndromes. In many cases, the cause of the disease was not found. Two types of early onset adolescents are included: