Catholic doctrine regards chemical abortion as gravely immoral when it directly intends to prevent the implantation of, or to kill, an already-conceived embryo. The fact that the means is pharmaceutical rather than surgical does not change its moral nature.

• Abortion is defined morally by its object and intention, not by the method used. Direct abortion means the deliberate killing of an innocent human being, whether the embryo is destroyed as the intended goal or as a means to another goal. It is intrinsically wrong and cannot be justified by circumstances such as danger to the mother, poverty, or fear of disability. 1 2
• Chemical abortion includes two relevant actions:
  • Interception: preventing an already-conceived embryo from implanting.
  • Contragestation: causing the death of an implanted embryo, as with mifepristone-based abortion.
    The Congregation for the Doctrine of the Faith classifies both as abortion and gravely immoral when deliberately chosen. 3 4
• Emergency contraception requires a factual distinction. If a drug acts only to prevent ovulation or conception, it is not chemical abortion, though contraception itself is evaluated separately in Catholic moral teaching. If it can act after fertilization by preventing implantation, deliberately choosing it for that possible effect is morally wrong. The Pontifical Academy for Life describes proven anti-implantation action as chemically induced abortion. 5 4
• A medical treatment for the mother may be permissible when it directly treats a serious pathology and the child’s death is an unintended, secondary effect—not the means or purpose of the treatment. This is morally distinct from administering a drug precisely to end the pregnancy. 6 7

Thus, in Catholic terms, chemical abortion is not a lesser form of abortion: when it directly destroys an embryo, it is the same grave moral evil as surgical direct abortion. The personal culpability of individuals can still be affected by factors such as ignorance, fear, coercion, or diminished freedom, but these factors do not make the act itself morally good.