actually, regarding rape, I found this:
lifeissues.net/writers/sau/sau_01afterrape.html
Finally, health care providers must provide treatment to prevent the possible contraction of venereal disease and pregnancy. The Directives state, “A woman who has been raped may defend herself against a conception resulting from sexual assault. If, after appropriate testing, there is no evidence that conception has occurred already, she may be treated with medication that would prevent ovulation, sperm capacitation, or fertilization. It is not permissible, however, to initiate or to recommend treatments that have as their purpose or direct effect the removal, destruction, or interference with the implantation of a fertilized ovum.”(no. 36)
The woman who is a victim of rape has the moral right to prevent the pregnancy for the following reasons: First, the rapist (including his sperm) is an unjust aggressor who has violated the woman’s dignity. Second, rape is an act of force and violence, unlike the conjugal love in marriage whereby both spouses give freely of themselves in an act of unitive and procreative love. Third, the woman is not responsible for the action, and thereby has the right to prevent the pregnancy. (Please note that for these three reasons, this guidance does not violate the Church’s teaching regarding contraception as expressed in Humanae Vitae, which, because of the free-giving between spouses, stated, "Each and every marriage act must remain open to the transmission of life (no. 11).)
My response is;
if there is no knowledge of conception, it is my understanding that the normal medical procedure is to do a DNC to remove all matter from the aggressor. perhaps someone with knowledge in this area can speak to this.
It seems to me that once knowledge of conception has taken place, then life MUST be respected.
However, it seems that medical procedures are certainly licit and allowable as a response to the crime for the woman who was attacked.