Ok, someone already posted the definition of murder. So that leaves the definition as to whether the zygote/fetus is a person. What do we know about it from science?
1. The cells after conception (initial splitting of the fetilized egg) are living cells.
2. Those cells are human.
3. Those cells exist because a human egg was fertilized by a human sperm.
4. Those cells have a unique identifiable DNA structure not matching any other human being. Therefore, those cells belong to a unique human being, called a person. Even if that person is only made up of two cells instead of hundreds of trillions of cells (or however many actually exist in a person, don't thing anyone ever sat down and counted them). While we cannot actually perform a DNA test on just two cells, that would be too small a sample and would kill the two cells in question, we know that those two cells have that unique DNA structure because ever human being grows through their cells dividing. Those two cells have to contain the unique DNA structure because we can later test cells, when it doesn't cause the death of all the cells making up the person, and every cell that will ever make up a person comes from the division of the fertilized egg into those first two cells.
5. Those cells have a chromosome pair that determine the sex of the person those cells belong to.
6. Abortion, whether by medical means or by usning "the morning after pill" is a deliberate act to kill the person who is made up of those cells.
7. The deliberate killing of a human being is murder.
Conclusion from this, Abortion is murder, whether it is called that or not because science can prove beyond any doubt, through genetic testing, that a unique human being exists, even if that human being in question is only made up of two cells, they are living, they are human, they are genetically a new human being.
