Obese children are prone to encounter the dangers of abnormal sexual development, such as early sexual development, delayed sexual development, sexual development disorders and other problems. 1, delayed sexual development Many obese boys are often accompanied by delayed sexual development during puberty. A study found that male obese children with abnormal sexual development up to 80%, “small fat pier” is not only the accumulation of subcutaneous fat, but also their internal organs are constantly fattening, the fattening of the pituitary gland will reduce the secretion of gonadotropin, affecting the secretion and release of androgens, resulting in the blood androgen and estrogen The ratio of androgen and estrogen in the blood is disproportionate, the prolactin is increased, and the endocrine disorder leads to testicular dysplasia, penile spongiosity dysplasia, and short penis; obese boys are feminized: little or even no beard, sparse axillary hair, inconspicuous throat nodes, grayish white face, delicate skin, plump hips, bilateral breast development, etc.; the fat accumulation in the lower abdomen and pubic symphysis of affected children covers the external genitalia, leading to a hidden penis and affecting It also affects the development of the penis and scrotum. If left untreated, the development will cause irreversible damage, resulting in adult gonadal dysplasia, sexual dysfunction and even infertility. It is also believed that the testicular mesenchyme is infiltrated with fat cells from childhood obesity, thus affecting the function of the mesenchymal cells in producing androgens. Relevant experts remind parents, must make children from childhood to avoid excessive obesity. 2, sexual development in advance With delayed sexual development is the opposite of some obese children encounter is the opposite of the problem of early sexual development. Obese children generally have more overweight, height growth acceleration and bone age early development phenomenon, obese children’s sexual development in advance, may be related to the early development of adrenal cortical function. Such as obese girls menstruation first menstruation than non-obese children to early, normal children after 10 years old began breast development, boys after 12 years old began testicular enlargement, and later gradually complete the development of gonads and secondary sexual characteristics. Many obese girls have early breast development and body development, some have breast development before the age of 8, and it is also more common to see the first menstruation before the age of 9. Many obese boys have early development of the laryngeal nodes, beard, and voice change, and some children have their first ejaculation at age 12 to 13 or earlier. Some obese women also have abnormal ovarian function, such as irregular menstruation, menorrhagia or amenorrhea, and hairiness, which can lead to infertility in adulthood. Because of the excessive secretion of estrogen, the first menstruation is early, but at the same time, it affects the ovarian function, resulting in impaired follicle development, ovulation and poor egg development. And later on, there will be a decrease in estrogen secretion, leading to early amenorrhea, early menopause and premature aging in women. What’s more, due to the excessive secretion of estrogen in obese children, boys show feminine development and epiphysis will generally close early, resulting in shorter puberty and shorter height than their peers.