I haven’t read the replies but will take a stab at it.
“From what point do you consider it a baby?”
Technically, the phases development follow as such: Zygote, embryo, fetus, and infant, a.k.a. baby.
ALL are phases of the development of a human being. This is not a matter of what a “consider”; rather, it is a matter of embryology, i.e. science.
The pro-life philosophy argues that it is ethically unacceptable to take the life of a defenseless human being during
any phase of human development.
> # A doctor takes out an egg from a woman and a single sperm from a man and keeps them in separate containers. He or somebody else then proceeds to insert the sperm into the egg. Not a minute later he or another person comes and puts some liquid on it and kills the cell. Is that an abortion or a murder?
It all comes down to semantics. It would not be an abortion because that requires
aborting a human being from a woman. It would not technically be murder because murder is a legal construct; to murder is to commit an illegal act of killing.
Pro-lifers would argue, however, that it would be an act of
unjust killing.
You will realize that something written 2000 years ago by PEOPLE cannot answer these questions.
Is your atheist friend referring to the Bible? The Bible doesn’t specify each and every
method of killing - e.g. stabbing, strangling, abortion, or drive-by shooting. Is simply commands us not to kill.
Whether or not your friend accepts this as a standard of human morality remains to be seen, but that is the Judaeo-Christian ethic.
For further information and answers to his questions, I would encourage your friend to look at organizations like Secular Pro-Life or Pro-Life Humanists.