## 3. Secundary characteristics

GIRLS
The ovaries produce the female sex hormones estrogen and progesterone. Estrogen stimulates the maturation of eggs in the ovaries. Progesterone maintains pregnancy and is also known as the pregnancy hormone.

Estrogen also influences the development of secondary sex characteristics in women.

BOYS

Under the influence of hormones from the pituitary gland, the male sex hormone testosterone is formed in the testes. Testosterone stimulates the production of sperm cells.

Sex hormones also influence the development of secondary sex characteristics in men