I'm not asking you what you would call it - "fetus" is merely a medical terms that refers to the unborn human species. So, are you saying it's a human being? I'm asking you what it is. What is it? Now, just when did that fetus become a 'person'? Remember, you are using the argument of the beard here.
You just trapped yourself with your own stupid question. That is a question for you, not me. You already know (unless your daft) that I don't believe the being in the womb ever "becomes" a person - but YOU DO! (I believe it is a person from conception). So, YOU need to TELL ME when that being becomes a person. At what stage in gestation? If you can't tell me authoritatively when it becomes a person, then you most certainly do not have the moral authority to kill it because you cannot be sure you are not killing a person. Or is it that you don't care if you don't know because you like killing? Oh, and when you answer, you can also tell me precisely what moral or scientific authority (other than your own arbitrary corrupt mind) you are using to make your claim.