A person is simply a human being. And it is an undeniable scientific fact that the zygote/embryo/fetus is a human being.
it is human 'life' but a post born PERSON is a human being.
AS for the illustration you got off on that implied human embryos could be a bird, reptile or pig, that is total hogwash. It is a human being in an early stage of development. A human being who cuts a first tooth is in a stage of development in which his pain is translated into a cry for help. A human being who commits to an act of unprotected sex that results in a mass of human cells implanting into its mother's womb is in the first stages of human development. The male participant in this pleasant gift of sex is the father, and the female participant is the mother. Their genes are combined into a brand new and separate human being, who like the father needing some female pleasure, needs a home. The time for her to elect not giving a new human being in his first stage of development should have read a book instead of having sex with someone who considered her just an object and possibly, vice-versa.
If you can kill a fetus, don't be surprised if the world doesn't just decide killing anyone who makes you feel obligated will just live with your murder and won't care for you or think of you ever again since your death was just an unpleasant occurance in a world full of murderous killers looking for a thrill of killing, which is the wont of serial killers.
As ye sow, so shall ye reap. It was true then, and it will be true when women change the world into a place that accepts murderers without the blink of an eye or one iota of caring.
You kill your own, you get a world of killing ahead of you, and that's how it is. I did not make the rules of the world, I just know what they are. Don't shoot the messenger because you support killing unborn human beings (who will never be pigs, by the way), you're going to find the dice roll will be on you sooner than you think.