Some sharks let their eggs hatch inside themselves so at birth they would be called a pup. Some sharks lay egg sacs. At birth those would be called egg sacs. Once they hatch they would also be pups.
A baby is called a newborn immediately after birth.
a baby hamster
Vaginal
The birth process of goats is called 'kidding'. (no kidding)
Baby ferrets are called Kits.
It's called a fetus up to week 38 and after that a baby. After birth, no matter when it happens, it's called a baby or infant.
giving birth? having a baby? delivering? Farrowing
A baby stingray is called a pup. It is born fully developed and able to swim immediately after birth.
-birth -going into labor
It is called a birth defect.
It is called a cub or a pup or a whelp a nd that's what a baby aardwolf is called
If a baby dies at birth, it's called "stillborn".