The fertilized egg does meet the criterion that are set to determine if organisms can be classified as living or non-living. In addition, an analysis of the development of the unborn being from conception through birth reveals many facts such as the presence of a beating heart, a functioning brain, and muscular movements which can only be found in living organisms. Finally, research has shown that the fetus is a separate entity from the mother. They are not one being, but two distinct individuals.
These biological facts lend strong support to the idea that life begins at conception.