Question

What is the use of testosterone? Why do we have two of them?

Answer 1

A testosterone is the hormone produced in the testes that stimulates the development of secondary sexual characters in males.
Its important functions are
Development, maturation and functioning of the male accessory sex organs like vas deferens and seminal vesicles
Stimulate muscular growth, growth of facial hair, low pitch voice, etc., sperm production

Estrogen- It is a hormone produced in females by ovaries.
Functions of estrogen:-
It brings about the secondary sexual characters.
Growth and functioning of the female secondary sex organs.
Hope you understand!