A Very Short History of Christian Personhood
Some people have been taught that "Christianity always has been anti-abortion." That is fake news.
Up until 1679, these two propositions were part of the Roman Catholic Church:
34. It is lawful to procure abortion before ensoulment of the fetus lest a girl, detected as pregnant, be killed or defamed.
35. It seems probable that the fetus (as long as it is in the uterus) lacks a rational soul and begins first to have one when it is born; and consequently it must be said that no abortion is homicide.