When does life begin?
Biology is clear that at conception, also known as fertilization, a unique organism comes into existence. Since this new life possesses human DNA and is the offspring of human parents, it can only legitimately be described as human life.
Since there is no question that human zygotes, embryos and fetuses are alive, some have attempted to claim that human beings are not “persons” until some threshold is crossed, such as viability, the capacity to feel pain, birth, or even the first year after birth. The merits of such notions could be debated, but it should be clear that they are not
based on science but rather on ideology, philosophy, or belief.
As far as observable science is concerned, human life begins at conception.
Condic, Maureen, Ph.D. “When Does Human Life Begin? A Scientific Perspective.” The Westchester Institute, October 2008. Accessed October 10, 2013. http://westchesterinstitute.net/images/wi_whitepaper_life_print.pdf.