When you don't know the name of an egg that's been fertilized, you can't name whether or not it's human, because you don't understand it's category. At the very least, your intellectual framework is incomplete. Therefore, your assertion that a human fertilized egg isn't human is disingenuous because you don't yet know how to make the species distinction.
Discussion
No, I am just not forcing myself in trying to fit it into another taxonomy. Eggs are eggs and that's it. They don't need to be anything else. You might think that is incomplete. But for me it is as complete as it gets. Going beyond just adds noise.
No need to classify eggs, any egg might grow into any species at all. This insight solves IVF!