There is no difference as I'm not speaking about eating them. I'm talking about classification of life forms in their developmental stages, and the implications therein. As such, when you ask for apples, you don't ask for a tree. If you want caviar, you don't ask for fish. An embryo is not a human.it is an embryo. A zygote is not a human, it is a zygote.
Excellent red herring though.
Cue more semantics based on sentimentality in 3... 2...