Not only do the cells divide, they arrange themselves so that they form the basic shape of the human body. So when one speaks about the human fetus in the womb, they are definitely discussing a living creature. Another frequently cited argument is whether or not the fetus in the womb is actually human. This decision was hardly a bright spot in human history. Biology offers an answer to the question of what is human.
Humans have a unique genetic system that sets it apart from all other animals.
Human cells each have 46 chromosomes that define and direct human body structure and function. Each human has a discreet set of genetic information. In analyzing the DNA from human beings, it can be noted that each individual's DNA is similar enough to the rest of the human race to define the individual as human, yet it is different enough to distinguish one individual from the rest. This discreet information is created at the moment when the nuclei of a sperm and ovum are fused. The mother and father each contribute 23 chromosomes that recombine to create a new individual.