Here's a breakdown of the terms:

* Embryo: The developing stage of a multicellular organism, typically from fertilization until the formation of major organs and body systems.

* Fetus: A later stage of development, usually after the embryo has formed the basic structures and starts to resemble its adult form.

* Larva: An immature stage of some animals that undergoes metamorphosis (a significant transformation) to reach its adult form. Examples include caterpillars (butterfly larvae), tadpoles (frog larvae).

So, while "embryo" is the most general term for an early developmental stage, it's important to consider the specific organism and its developmental process to understand its exact stage.