Apparently, to the ghouls, the location of an object greatly changes the nature of the object. In the womb, not a person therefore “murder” does not apply - near the womb exit, a full person and you can use the term “murder”.
If I take my lamp from my living room and put it in my bedroom, it does not cease to be a lamp. It’s either a lamp or it isn’t. Doesn’t matter how long it’s been in the room.