kangaroo
I the mammal is a monotreme, it developes in an egg. If the mammal is in the marsupial group, it develops in a pouch on its mother. If it is a placental mammal, it develops in the placenta.
The fetus develops in the womb of the mother.
All young mammals develop in the amniotic sac of their mother. For example, a human fetus develops in the mother's womb. Which is an anmiotic sac.
A kangaroo is an example of a mammal that carries their young in a pouch. The joey, or baby kangaroo, develops inside the mother's pouch after being born extremely premature.
In a way, you could say "both inside and outside". The egg is produced and fertilized inside the mother. She lays the egg and incubates it so the embryo grows outside the mother and develops into the hatchling hummingbird.
A pig is classified as a placental mammal because it develops inside its mother's uterus connected to her via a placenta, which allows for exchange of nutrients and waste between the mother and developing offspring. This is a common feature among most mammals, including pigs.
uterus
a mammal feeds his young with milk from the mother and has hair
A placental mammal retains the young inside the body of the female and are born alive.
A developing mammal inside of the mother.
no your mother is
Insects start as eggs and mammal's are born from there mother