Some people {who were not aborted} like to justify killing those awaiting their turn at birth by claiming they aren’t really human beings, just ‘potential’ human beings. This position isn’t only grossly ignorant, it’s incredibly disingenuous. These same people love to use science to drive social policy when it comes to issues like global warming, vaccinations, smoking cessation, and obesity, but wholeheartedly reject science when it comes to aborting their own children.
Human development begins after the union of male and female gametes or germ cells during a process known as fertilization (conception). Fertilization is a sequence of events that begins with the contact of a sperm (spermatozoon) with a secondary oocyte (ovum) and ends with the fusion of their pronuclei (the haploid nuclei of the sperm and ovum) and the mingling of their chromosomes to form a new cell. This fertilized ovum, known as a zygote, is a large diploid cell that is the beginning, or primordium, of a human being.
— Moore, Keith L. Essentials of Human Embryology. Toronto: B.C. Decker Inc, 1988, p.2
Abortion undeniably kills living human beings.
Science, Philosophy and Common Sense
That life begins at conception is indeed scientific truth. It is also common sense that all 100 Billion people who have ever lived on the earth started their life at conception and are exactly the same person in the womb as the person later walking and talking. The only difference is age.