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  2. Delayed puberty - Wikipedia

    en.wikipedia.org/wiki/Delayed_puberty

    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]

  3. Nocturnal penile tumescence - Wikipedia

    en.wikipedia.org/wiki/Nocturnal_penile_tumescence

    In a study published in 1972, [11] during puberty, the average tumescence time per night was 159 min; average REM sleep time was 137 min. Average simultaneous REM sleep and penile tumescence per night was 102 min. Study subjects averaged 6.85 tumescence episodes/night, and, of these, 5.15 occurred during a REM sleep period. Tumescence episodes ...

  4. Hypogonadism - Wikipedia

    en.wikipedia.org/wiki/Hypogonadism

    The symptoms of hypogonadotrophic hypogonadism, a subtype of hypogonadism, include late, incomplete or lack of development at puberty, and sometimes short stature or the inability to smell; in females, a lack of breasts and menstrual periods, and in males a lack of sexual development, e.g., facial hair, penis and testes enlargement, deepening ...

  5. Your Body Never Forgets Muscle. So Here's How Long It ... - AOL

    www.aol.com/body-never-forgets-muscle-heres...

    Learn how muscle memory works, how long it takes to develop, and why it’s crucial for fitness. Plus, tips to train smarter and build strength and muscle faster.

  6. What is precocious puberty? Experts explain. - AOL

    www.aol.com/lifestyle/parents-know-precocious...

    What is precocious puberty, and what are the first signs? Precocious means early or premature. When doctors talk about precocious puberty, they mean any signs of sexual maturity happening earlier ...

  7. Why Is Puberty Starting Earlier? New Research Points To ... - AOL

    www.aol.com/lifestyle/why-puberty-starting...

    Research has showed that the average age of starting puberty continues to drop over time: One study published in 2020 shows that the average starting age of puberty for girls has decreased by ...

  8. Puberty - Wikipedia

    en.wikipedia.org/wiki/Puberty

    Early puberty also correlates with increased sexual activity and a higher instance of teenage pregnancy, both of which can lead to depression and other psychosocial issues. [23] On the other hand, late-maturing males develop lower self-esteem and confidence and generally have lower popularity among peers, due to their less-developed physiques.

  9. Nocturnal emission - Wikipedia

    en.wikipedia.org/wiki/Nocturnal_emission

    Due to the difficulty in collecting ejaculate produced during nocturnal emissions, relatively few studies have examined its composition. [4] [5]In the largest study, which included nocturnal emission samples from 10 men with idiopathic anejaculation, the semen concentration was equivalent to samples obtained from the same men by penile vibratory stimulation, although the proportions of sperm ...