Medicine confirms the existence of the child before birth as a distinct human person. Fetal surgery has become a medical specialty, and includes the separate provision of anesthesia to the baby.
You can cite some of the surgeries now performed on children before their birth, such as shunting to bypass an obstructed urinary tract, removal of tumors at the base of the tailbone, and treatment of congenital heart disease.
There are many others. This is the truth and it may pain those who believe in abortion but we must all radically change our mind about this. Why not ask, what if what I believe about it being okay to abort (murder) a baby is wrong?
Does science supports the Pro Life argument?
Scientists define an organism as a complex structure of interdependent elements constituted to carry on the activities of life by separately-functioning but mutually dependant organs. The human zygote meets this definition with ease.
Once formed, it initiates a complex sequence of events to ready it for continued development and growth: The zygote acts immediately and decisively to initiate a program of development that will, if uninterrupted by accident, disease, or external intervention, proceed seamlessly through formation of the definitive body, birth, childhood, adolescence, maturity, and aging, ending with death. This coordinated behavior is the very hallmark of an organism.
By contrast, while a mere collection of human cells may carry on the activities of cellular life, it will not exhibit coordinated interactions directed towards a higher level of organization.
Thus, the scientific evidence is quite plain: at the moment of fusion of human sperm and egg, a new entity comes into existence which is distinctly human, alive, and an individual organism – a living, and fully human, being.