It seems you may have misspelled the word. "Gestation" is the period of development in the womb from conception to birth in animals, including humans. During gestation, the fetus grows and develops before being born.
It is the gestation period.
Humans
How long is the embryonic period in humans?
Neonatology.
Before birth, yes.
Gestation
It is the development and growth that happens after the animal/human is born. (prenatal is before birth, postnatal is after birth)
Nothing
The term for the nine months of human development between fertilization and birth is called the gestation period.
It is called the gestation period.
When the baby is born