Puberty:
- Puberty refers to the transition from a child to an adult accompanied by sexual maturity, physical and psychological changes, and the development of secondary sexual characteristics.
- Puberty begins at an average age of 10 years for girls and 12 years for boys.
- Environmental and genetic factors contribute to the onset of puberty.
- Puberty begins when the hypothalamus secretes the gonadotropin-releasing hormone (GnRH).
- Follicle-stimulating hormone and luteinizing hormone are released from the pituitary gland on stimulation by GnRH.
- Follicle-stimulating hormone and luteinizing hormone trigger the sex organs to release sex hormones.
Changes observed in boys:
- The testicles and scrotum become bigger.
- Hair growth in the penis and underarms.
- Increase in height and muscle mass.
- A change in voice.
- Body hair growth, sweating, and body odor.
Changes in girls:
- Breast buds develop.
- Under arm hair and pubic hair begins to grow.
- An increase in height.
- Skin becomes oily and acne may develop.
- Menstruation beings at around 12 years.