Secondary characteristics in boys*
- Under the inuence of hormones, larynx grows prominently, vocal cords become longer and thicker, causing the voice to become hoarse.
- Hair starts growing in the frontal region of the *** area.
- Appearance of hair in other areas such as underarms, legs, chest, abdomen, back, and face.
- Enlargement of **** followed by ****.
- More secretion of oil from the skin, resulting in the appearance of acne.
- Testes grow and start producing sperms.
Secondary characteristics in girls*
- Increase in ** size and the darkening of the skin of nipples present at the tips of the breasts.
- Appearance of hair in the *** area.
- Appearance of hair in other areas such as underarms, face, hands, and legs.
- Increase in the size of ** and ovary.
- Beginning of the menstrual cycle.
- More secretion of oil from the skin, resulting in the appearance of acne.
