I personally believe life begins at birth, not at conception. And in that light, I don't have any problem with preventing pregnancy in cases of incest or rape.
Quotations from the Early Church Fathers:
HE DIDACHE
“The second commandment of the teaching: You shall not murder. You shall not commit adultery. You shall not seduce boys. You shall not commit fornication. You shall not steal. You shall not practice magic. You shall not use potions. You shall not procure [an] abortion, nor destroy a newborn child” (
Didache 2:1–2 [A.D. 70]).
THE LETTER OF BARNABAS
“The way of light, then, is as follows. If anyone desires to travel to the appointed place, he must be zealous in his works. The knowledge, therefore, which is given to us for the purpose of walking in this way, is the following. . . . Thou shalt not slay the child by procuring abortion; nor, again, shalt thou destroy it after it is born” (
Letter of Barnabas 19 [A.D. 74]).
TERTULLIAN
“In our case, a murder being once for all forbidden, we may not destroy even the fetus in the womb, while as yet the human being derives blood from the 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 birth. That
is a man which is
going to be one; you have the fruit already in its seed” (
Apology 9:8 [A.D. 197]).
“Among surgeons’ tools there is a certain instrument, which is formed with a nicely-adjusted flexible frame for opening the uterus first of all and keeping it open; it is further furnished with an annular blade, by means of which the limbs [of the child] within the womb are dissected with anxious but unfaltering care; its last appendage being a blunted or covered hook, wherewith the entire fetus is extracted by a violent delivery.
“There is also [another instrument in the shape of] a copper needle or spike, by which the actual death is managed in this furtive robbery of life: They give it, from its infanticide function, the name of
embruosphaktes, [meaning] “the slayer of the infant,” which of course was alive. . . .
“[The doctors who performed abortions] all knew well enough that a living being had been conceived, and [they] pitied this most luckless infant state, which had first to be put to death, to escape being tortured alive” (
The Soul 25 [A.D. 210]).
“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” (ibid., 27).
“The law of Moses, indeed, punishes with due penalties the man who shall cause abortion [Ex. 21:22–24]” (ibid., 37).