G o n a d

Gonad in male is testes that is necessary to produce sperm cells and testosterone hormone. It is very important to stimulate secondary sexual characteristics and sexual behavior.

Gonad in female is ovarium whose function is to produce several hormones which are as follows :

1. Estrogen : which has function to stimulate secondary sexual characteristics and sexual behaviour.

2. Progesterone : ehich has function to maintain pregnancy and the growth and development of milk gland

3. Relaxin : which has function to prevent uterus contraction and to ease delivery process.