The Catholic Church opposes all forms of abortion procedures whose direct purpose is to destroy an embryo, blastocyst, zygote or fetus, since it holds that "human life must be respected and protected absolutely from the moment of conception". From the first moment of his existence, a human being must be recognized as having the rights of a person – among which is the inviolable right of every innocent being to life." However, it does recognize as morally legitimate certain acts which indirectly result in the death of the fetus, as when the direct purpose is removal of a cancerous womb. Canon 1398 of the 1983 Code of Canon Law imposes automatic (latae sententiae) excommunication on Latin Catholics who procure a completed abortion, if they fulfill the conditions for being subject to such a sanction.Eastern Catholics are not subject to automatic excommunication, but by Canon 1450 of the Code of Canons of the Eastern Churches they are to be excommunicated by decree if found guilty of the same action, and they may be absolved of the sin only by the eparchial bishop. In addition to teaching that abortion is immoral, the Catholic Church also makes public statements and takes actions in opposition to its legality.
Many, and in some Western countries most, Catholics disagree with the official position of the Catholic Church, which opposes abortion and its legality; with views ranging from allowing exceptions in a generally pro-life position to acceptance of complete legality and morality of abortion. There is a correlation between Mass attendance and agreement with the official teaching of the Church on the issue; that is, frequent Mass-goers are far more likely to be pro-life, while those who attend less often (or rarely or never) are more likely to be pro-choice.