Is a fetus also called as fetus?

its called a embryo before it becomes a fetus

From week 38 and/or when he's born he is called a baby.

Embryo's are called fetuses after 8 weeks. The term zygotes is only used right after fertilization before cleavage occurs when the embryo is still a single cell.

It is called lanugo, the skin is also coated with a white greasy like substance called vernix and protects the fetus from the effects of being in the amniotic sac ( bag of water)

A fetus (or foetus, or fœtus) is a developing mammal or other viviparous vertebrate, after the embryonic stage and before birth. The plural is fetuses (foetuses, fœtuses) or, very rarely,...