There isn't really another *common* name for a human embryo. While "embryo" is the scientifically recognized term, people might use some less formal terms, but they are often not very precise:

* Unborn baby: This term is often used in a broader context, encompassing the entire period of pregnancy, not just the embryonic stage.

* Fetus: While "fetus" follows the embryonic stage, it's important to note that the term applies from week 9 of pregnancy onwards.

Ultimately, "embryo" is the most accurate and widely accepted term for the developing human being in the early stages of pregnancy.