Secondary Sexual Characteristics
- Secondary sexual characteristics are the changes that occur during puberty
- Their development is controlled by the release of hormones
- Oestrogen in females
- Testosterone in males
Female secondary sexual characteristics
| Female | Effects of Oestrogen |
 |
Development of breasts |
| Body hair grows | |
| Menstrual cycle begins | |
| Hips get wider |
Male secondary sexual characteristics
| Male | Effects of Testosterone |
 |
Growth of penis and testes |
| Growth of facial and body hair | |
| Muscles develop | |
| Voice breaks | |
| Testes start to produce sperm |
- Some changes occur in both males and females, including growth of sexual organs and growth of body hair
- Emotional changes also occur due to the increased levels of hormones in the body
- These include more interest in sex and increased mood swings
