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Starting puberty significantly early — younger than age 8 in girls, 9 in boys — may have health effects lasting into adulthood, including higher risks of breast cancer, diabetes and heart disease.
[19] In addition to diet and exercise habits, exposure to chemicals that mimic estrogen (known as xenoestrogens) is another possible cause of early puberty in girls. Bisphenol A, a xenoestrogen found in hard plastics, has been shown to affect sexual development. [20] "Factors other than obesity, however, perhaps genetic and/or environmental ...
The first-of-its-kind research found that a common chemical, musk ambrette, used to add scent to a wide range of products, may cause the body to release puberty-related hormones earlier than it ...
The penis can regularly get erect during sleep and men or males often wake up with an erection. [34] Once a male reaches his teenage years, erections occur much more frequently due to puberty. [35] Erections can occur spontaneously at any time of day, and if clothed may cause a bulge or "hump".
Kisspeptin-GPR54 signaling has an important role in initiating secretion of gonadotropin-releasing hormone (GnRH) at puberty, the extent of which is an area of ongoing research. [7] Gonadotropin-releasing hormone is released from the hypothalamus to act on the anterior pituitary triggering the release of luteinizing hormone (LH), and follicle ...
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Late maturing boys can be less confident because of poor body image when comparing themselves to already developed friends and peers. However, early puberty is not always positive for boys; early sexual maturation in boys can be accompanied by increased aggressiveness due to the surge of hormones that affect them. [29]
In very rare instances, menarche may occur at an unusually early age, preceding thelarche and other signs of puberty. This is termed isolated premature menarche, but other causes of vaginal bleeding must be investigated and excluded. Growth is usually normal. [16] Isolated premature menarche is rarely the first manifestation of precocious puberty.