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Puberty is considered delayed when the child has not begun puberty when two standard deviations or about 95% of children from similar backgrounds have. [7] [8] [9]In North American girls, puberty is considered delayed when breast development has not begun by age 13, when they have not started menstruating by age 15, [2] and when there is no increased growth rate. [8]
Constitutional delay of puberty is not due to a pathologic cause. It is considered a variant of the timeline of puberty. [ 24 ] Although more common in boys, girls with delayed puberty present with onset of secondary sexual characteristics after the age of 14, as well as menarche after the age of 16. [ 25 ]
CDGP is a conditions characterized by an extreme variation from the normal timing of puberty. Both gonadarche and adrenarche are delayed in this case, resulting in some children developing later than others. There is a delay in the development of the reproductive organs and adrenal glands seen in children with CDGP.
Black children of low socioeconomic status are starting their periods earlier than the average age, and it takes more time for their menstrual cycles to become regular, according to a new report ...
In the United States, some public schools have a sex education program that teaches girls about menstruation and what to expect at the onset of menarche (often this takes place during the fourth grade). Historically menstruation has been a social taboo and girls were taught about menarche and menstruation by their mothers or a female role model.
If the cause can be traced to the hypothalamus or pituitary, the cause is considered central. Other names for this type are complete or true precocious puberty. [6] Causes of central precocious puberty can include: hypothalamic hamartoma produces pulsatile gonadotropin-releasing hormone (GnRH) Langerhans cell histiocytosis; McCune–Albright ...
Developmental delay is prevalent in approximately 1-3% of children under the age of 5 worldwide. [5] According to a systematic analysis done for a conducted study in 2016, there are approximately 52.9 million children worldwide under the age of 5 that are affected by some type of developmental delay or delayed milestone.
XY complete gonadal dysgenesis, also known as Swyer syndrome, is a type of defect hypogonadism in a person whose karyotype is 46,XY. Though they typically have normal vulvas, [1] the person has underdeveloped gonads, fibrous tissue termed "streak gonads", and if left untreated, will not experience puberty.