Cygnets.
feetus
An unborn baby is referred to as a fetus, or foetus.
Well in the beginning it's a Blastocyst but I think you are looking for Embryo.
an Orthodox
Unborn Baby.
The scientific,most recognizable name for it is called,foritsiden.
Embryo or Egg.
Louis B
A fetus is another name for an unborn baby, and growth is how it gets bigger.
Oxygen
fetus
Sharon Tate's unborn baby boy (who died with her) was posthumously named Paul Richard Polanski. She didn't have a daughter.