Barnabas (100 A.D.)

The Epistle of Barnabas
Thou shalt not slay the child by procuring abortion; nor, again, shalt thou destroy it after it is born. (Chapter 19)

The Teaching of the Twelve Apostles (120)
Thou shalt not murder a child by abortion nor kill that which is begotten (Chapter 2).

Athenagoras (177)

A Plea for the Christians
Who does not reckon among the things of greatest interest the contests of gladiators and wild beasts, especially those which are given by you? But we, deeming that to see a man put to death is much the same as killing him, have abjured such spectacles. How, then, when we do not even look on, lest we should contract guilt and pollution, can we put people to death? And when we say that those women who use drugs to bring on abortion commit murder, and will have to give an account to God for the abortion, on what principle should we commit murder? For it does not belong to the same person to regard the very foetus in the womb as a created being, and therefore an object of God’s care, and when it has passed into life, to kill it. (Chapter 35)

Tertullian (220)

The Apology
In our case, murder being once for all forbidden, we may not destroy even the foetus in the womb, while as yet the human being derives blood from other parts of the body for its sustenance. To hinder a birth is merely a speedier man-killing; nor does it matter whether you take away a life that is born, or destroy one that is coming to the birth. That is a man which is going to be one; you have the fruit already in its seed. (Chapter 9)

A Treatise on the Soul
How, then, is a living being conceived? Is the substance of both body and soul formed together at one and the same time? Or does one of them precede the other in natural formation? We indeed maintain that both are conceived, and formed, and perfectly simultaneously, as well as born together; and that not a moment’s interval occurs in their conception, so that, a prior place can be assigned to either. (Chapter 27)

Now we allow that life begins with conception, because we contend that the soul also begins from conception; life taking its commencement at the same moment and place that the soul does. (Chapter 27)

The embryo therefore becomes a human being in the womb from the moment that its form is completed. The law of Moses, indeed, punishes with due penalties the man who shall cause abortion, inasmuch as there exists already the rudiment of a human being, which has imputed to it even now the condition of life and death, since it is already liable to the issues of both, although, by living still in the mother, it for the most part shares its own state with the mother. (Chapter 37)

Minucius Felix (210)

The Octavius
There are some women who, by drinking medical preparations, extinguish the source of the future man in their very bowels, and thus commit a parricide before they bring forth. (Chapter 30)

Cyprian (200-258)

The Epistles
The womb of his wife was smitten by a blow of his heel; and in the miscarriage that soon followed, the offspring was brought forth, the fruit of a father’s murder. And now does he dare to condemn the hands of those who sacrifice, when he himself is more guilty in his feet, by which the son, who was about to be born, was slain? (Epistle 48)