What is the difference between fetal and fatal?

Fetal and Fatal are both adjectives but are totally different! Fetal is descriptive of the fetus ( also written as Foetus) of an organism, which is the embryo of an animal; For example, "Fetal development in humans occurs in many stages".

Fatal on the other hand is descriptive of a situation or a negative event; for example, " A fatal accident occurred down the road and several people were injured"