Age range of female puberty

Girls' childhood: from birth 4 weeks to about 12 years old. Before the age of 10, the body of children continues to grow and develop, but the sexual organs are childish. The vagina is slender, the epithelium is thin, and there are no wrinkles. The vaginal acidity is low, the resistance to infection is weak, and it is easy to get inflammation. The uterus is not large, the cervix is ​​long, accounting for about 2/3 of the total length of the uterus, the muscle wall of the uterus is too thin, the fallopian tubes are tortuous and thin, the uterus and ovaries are long and narrow, and the follicles are underdeveloped. The uterus, bilateral fallopian tubes and ovaries are located in the abdomen, close to the upper edge of the pelvis.

1. Fetal period

The fetus refers to the embryo after 8 weeks of pregnancy. After the two sexes have intercourse, the man's sperm passes through the vagina, cervix, and uterine cavity and reaches the bilateral fallopian tubes. Several sperms pass through the regenerated radioactive corona by tail movement, and the sperm acrosome releases hyaluronidase and leukemia, absorbs the zona pellucida of the oocyte, and penetrates into the zona pellucida. The male sperm cytoplasm combines with the egg cytoplasm, and this is called sperm-egg fusion. The combination of sperm and egg creates a new individual consisting of 23 pairs of sex chromosomes from the parents, one of which is basic and the other sex chromosomes are called sex chromosomes, XY for males and XX for females. Female test tube embryos will have uterine and ovarian structures in 8 to 12 weeks. The initial somatic cells divide into primary oocytes, and the sex cord cortical somatic cells form the initial oocytes. Later, the two mesonephric ducts grow into the female reproductive system.

2. Infancy

The first 4 weeks after birth is called the infancy period. Because the female fetus is affected by the mother's estrogen in the womb, the breasts may swell slightly and even secrete a small amount of milk within a few days after birth. A small amount of pink secretion will be discharged from the vagina, which will naturally disappear in a short time.

3. Childhood

The childhood period is from 4 weeks after birth to about 12 years old. Before the age of 10, the main part is human development, and the reproductive organs are still in a childish state; after the age of 10, the uterus and ovaries have a small amount of uterine development, but it is incomplete and there is no ovulation. The breasts and internal sex organs begin to grow and develop, and other female characteristics begin to appear.

4. Spring

The World Health Organization (WHO) requires that the puberty period is from 10 to 19 years old, from the first menstruation of girls to the stage when the male reproductive organs are fully grown and developed. The first menstruation of girls is a sign of puberty. During this period, the physical fitness gradually develops and matures, the uterus and ovaries develop and ovulate, the secretion of estrogen increases, the reproductive organs further develop, and the secondary sexual characteristics of girls appear. At this time, the girls' concepts, attitudes and moods are usually unstable, which should cause attention and concern.

5. Sexual maturity (growth period)

Estrus is one level of individual development. Individual differences include the shape and development of male reproductive organs, the perfection of function development and the perfection of secondary sexual characteristics development. The first sign of womanhood is the onset of menstruation, which ecologically marks the transition from adolescence to adulthood. The growth and development of female reproductive organs and functions is very slow before puberty, and accelerates after entering puberty. Women's uterus and ovaries are very small before the age of 8, and their growth and development accelerates between the ages of 8 and 10. The early menstrual period comes temporarily, and the net weight is 30% of the perfect uterus and ovaries. They reach perfection between the ages of 16 and 17. Women's breasts begin to grow around the age of 10. The age structure of girls' menarche is 10 to 16 years old. The female sexual organs and functions are fully developed at around 16 to 17 years old, and the average age for sexual development and maturity in female children is 11 to 12 to 16 to 17 years old. It lasts for about 30 years, and is characterized by regular ovulation and menstruation. Possess abundant reproductive function.

6. Early menopause

Early menopause is a medical term that refers to the stage in which the uterus and ovaries of women gradually decline before menopause. Early menopause usually occurs in women between the ages of 45 and 55, and is the stage when the ovaries further decline and eventually disappear. Early menopause is a physiological condition of women. As the deficiencies caused by early menopause interact with other physical and extra-physical factors, some women experience abnormal psychological and physical changes, which is called (also known as menopausal syndrome). It mostly occurs between the ages of 45 and 55. For many people, this symptom has begun to appear during the menopausal transition period, and can last until 2-3 years after menopause. For very few people, it can last until 5-10 years after menopause before the symptoms are relieved or disappear.

7. Mid- to late-stage menopause

Refers to the stage of life after menopause. Generally, women after 60 years old, their bodies gradually become brittle and enter middle and old age. During this period, women's ovaries completely decline, estrogen levels are low, and they cannot maintain their secondary sexual characteristics. Their reproductive organs become further brittle, and they often suffer from osteoporosis and easy fractures due to disorders in bone metabolism.