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Normal puberty

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3rd year 3rd rotation

Normal puberty

  1. 1. Normal Puberty FaizulHaris bin MohdHatta
  2. 2. What is puberty?Sounds like a disease.Does your face turn purple?Do you cough and sneeze?Does it last a long time or just a little while?Does everybody get it?Do my questions make you smile?Oh, puberty is something that everybody knowsHappens when your body grows and grows and grows!Inside and outside your body changes, then You've become an adult and never a child again.
  3. 3. Puberty The stage of physical maturation in which an individual becomes physiologically capable of sexual reproduction. Triggered by increased secretion of Luteinizing Hormone(LH). Results from changes in the hypothalamus that allow increased secretion of GnRH to stimulate secretion of LH
  4. 4. The Reproductive System
  5. 5. The Reproductive System
  6. 6. GnRH surge is triggered by a few factors: Nutrition Leptin level Genetics Mutation in genes encoding Neurokinin B which play a role in regulating the secretion of Kisspeptin GPR54: receptor for kisspeptin Physical activity Drugs
  7. 7. Onset of puberty Girls: 10-14 years old Boys: 12-16 years old
  8. 8. First signs Biological: Pulsatile LH especially during sleep Girls: Breast development Boys : Increase in the size of the testicles
  9. 9. Phases of Puberty Adrenarche Stage of maturation of the cortex of adrenal glands ↑ adrenal androgens secretion  Gonadarche Earliest gonadal changes Ovaries and testes begin to grow ↑ production of sex hormones
  10. 10. Thelarche First stage of secondary breast development Usually noticed as a firm, tender lump directly under the center of the nipple(papilla & areolla) Reffered as breast bud(Tanner stage 2) Pubarche First appearance of the pubic hair Results from ↑ levels androgens from adrenal glands or tester
  11. 11. Menarche First menstrual bleeding in females Possibility of fertility
  12. 12. Tanner stages Develop as a way to classify the time, course, and progress of changes that occur during puberty. Based upon attainment of secondary sex characteristics, which include genital development in males, breast development in females, and pubic hair development in both genders.
  13. 13. Female: Breast
  14. 14. Male: Genitalia
  15. 15. Pubic Hair
  16. 16. Growth Growth spurt/Peak height velocity Female: Happens in earlier stages of puberty Average age: 12.1 Male: Happens in later stages of puberty Average age: 14.1 Boys have greater velocity at the maximum pubertal growth rate
  17. 17. Other Changes in male Body and Facial hair Voice change Same time as growth of penis Musculature and body shape Heavier bones, nearly twice skeletal muscle Muscle develops mainly during the later stages of puberty Body odor, sweat glands, sebaceous glands and acne About the same time as facial and axillary hair growth
  18. 18. Other changes in female Vagina Becomes thicker and duller pink in color Uterus, ovaries and follicles in the ovaries Increase in size Menstrual and fertility Body shape and fat distribution Pelvis and hip widen More fat distributed to breasts, hips, buttocks, thighs, upper arm and pubis. Body odor and acne
  19. 19. Hormonal Changes Increase in: Testosterone Estrogen Prolactin Growth Hormone Insulin
  20. 20. Puberty is the bridge between being a kid and becoming an adult. As you cross this bridge, your body and your feelings change a lot. You also may feel differently about your family, friends and classmates, and view the things that they do in whole new ways. You may feel like changing what you do with them, the way you dress and the things you talk about. These differences are called "social" and "behavioral" changes.
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3rd year 3rd rotation


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