Indirect abortion is the name given by Catholic theologians to a medical procedure which has a beneficial medical effect and also results in an abortion as a secondary effect. Edwin F. Healy makes a distinction between "direct abortions" that is, abortion which is either an end or a means, and "indirect abortions", where the loss of the fetus is then considered to be a "secondary effect."
The relevant distinction may be between cases where the woman's life may be "in jeopardy", and cases where the woman would almost certainly die without the procedure that would also destroy the fetus. However, this does not mean the Catholic Church teaches that a direct abortion, even when intended to save the life of a woman, is not sinful.
This view is also held in Pope Paul VI's 1968 encyclical Humanae vitae, which says that "the Church does not consider at all illicit the use of those therapeutic means necessary to cure bodily diseases, even if a foreseeable impediment to procreation should result there from—provided such impediment is not directly intended for any motive whatsoever". Paul VI quotes Pius XII in a 1953 address to the Italian Association of Urology. For example, the removal of a cancerous uterus is allowed if life at conception and beyond is not present in uterus, so removal of uterus is allowed but procreation is not possible when uterus is removed.
As distinct from therapeutic abortionEdit
According to Archbishop Jose Antonio Eguren in Peru, indirect abortion is not the same as a therapeutic abortion. Eguren asserts that indirect abortion is an extraordinary moral case which has nothing to do ‘therapeutic abortion’; in Catholic doctrine, therapeutic abortion simply does not exist, since abortion is never a cure for anything.
Possible confusion with direct abortionEdit
According to Elio Sgreccia, President of the Pontifical Academy for Life, a great number of indications for such abortions have lost their raison d'être. He further asserts that the progressive extension of these indications beyond the scope of medicine has often been driven by political reasons, part of which are related to the eugenics movement.
Tuberculosis, cardiopathies, vascular diseases, diseases of the hematopoietic system (some forms of anemia), kidney diseases, hepatic and pancreatic diseases, gastro-intestinal diseases, pregnancy-related chorea, myasthenia gravis, and tumors are all diseases claimed to be motives for indications.
However, a thorough study of each one of them shows that the medical basis of these motives is very limited, and that in the cases where, in the absence of a therapeutic alternative, there remains a real risk for the life or health of the woman, these cases are in a strong and progressive downward trend.
Pope Benedict XVI speech in AngolaEdit
Pope Benedict XVI later gave a speech in Angola where he appeared to blur the distinction between indirect abortion and direct abortion. He condemned all forms of abortion, even those considered to be therapeutic. The Holy See Press Office subsequently reiterated the distinction between direct and indirect abortion, and commented that the allocution merely re-stated the Church's opposition to some sections of the gender-oriented Maputo Protocol.
There are licit and illicit approaches in dealing with ectopic pregnancies. The most commonly addressed by Catholic bioethicists is extrauterine tubal pregnancies in which salpingectomy is seen with consensus to be indirect while some claim salpingostomy and methotrexate to be indirect. 
Of the other 7-10% of ectopic pregnancies, there are interstitial pregnancy and cesarean scar pregnancy. Hysterectomy is the common treatment of choice for interstitial pregnancy with a loss of fertility. 
|Expectant management||Awaiting embryonic or fetal death, or development of viable pregnancy||Questionable, licit in some cases|
|Systemic methotrexate||Antimetabolite interferes with DNA synthesis, prohibiting placental growth and also fetal growth||Questionable, likely illicit|
|Intragestational methotrexate||Antimetabolite administered directly into the amniotic cavity||Questionable, likely illicit|
|Intragestational KCl||Cardiotoxin injected into fetus or amniotic cavity leading to fetal death||Illicit|
|Double-balloon catheter||Compression of fetal body and placenta leading to cessation of blood flow and fetal death||Illicit|
|Uterine artery embolization||Occlusion of one or both uterine arteries to cut off blood supply to fetus or to decrease hemorrhage||Illicit when used to cause fetal death; licit when used to prevent hemorrhage|
|Dilation and curettage||Removal of products of conception in pieces through the cervix||Illicit when performed on a living fetus, licit otherwise|
|Cornuostomy||Perforation of the uterine cornu and removal of products of conception whole or in pieces||Questionable when performed on a living fetus, licit otherwise|
|Salpingostomy||Incision of the fallopian tube and removal of products of conception whole or in pieces||Questionable when performed on a living fetus, licit otherwise|
|Cornual wedge resection||Resection of an interstitial pregnancy and the part of the uterus enclosing it||Licit|
|Gestational excision||Removal of products of conception from a cesarean scar, whole or in pieces||Illicit when performed on a living fetus, questionable otherwise|
|Scar excision||Resection of a cesarean scar pregnancy and the part of the uterus enclosing it||Licit|
|Scar revision (pregnancy salvage)||Reinforcement of the cesarean scar in order to promote viable pregnancy||Questionable|
|Hysterectomy||Resection of the entire uterus including the ectopic pregnancy||Licit, but generally to be avoided in order to preserve fertility, unless no other licit option is available|
- "Indirect Abortion". EWTN Global Catholic Television Network. Retrieved 2022-07-03.
- "Catechism of the Catholic Church - The fifth commandment". www.vatican.va. Archived from the original on 2002-09-06.
- Catholic News Agency: "Sister violated more than Catholic teaching in sanctioning abortion, ethicist says" May 19, 2010
- "Judge manipulates statements by Father Lombardi to push for abortion in Nicaragua". Archived from the original on 2009-04-09. Retrieved 2009-04-02.
- Sgreccia, Elio. Manuel de bioéthique. Paris, Mame-Edifa, 2004, p. 486
- Sgreccia, Elio. Manuel de bioéthique. Paris, Mame-Edifa, 2004, p. 488
- "Pope reiterates church ban on abortion". Archived from the original on 2012-02-19. Retrieved 2009-03-21.[dead link]
- "Radio Vatican". Archived from the original on 2012-06-30. Retrieved 2009-03-21.
- Hager, Samuel E. (2016). "Against Salpingostomy as a Treatment for Ectopic Pregnancy". The National Catholic Bioethics Quarterly. Philosophy Documentation Center. 16 (1): 39–48. doi:10.5840/ncbq20161615. ISSN 1532-5490.
- Goede, Maria T. De (2014). "An Argument against the Use of Methotrexate in Ectopic Pregnancies". The National Catholic Bioethics Quarterly. Philosophy Documentation Center. 14 (4): 625–635. doi:10.5840/ncbq201414466. ISSN 1532-5490.
- Clark, Peter A. (2000). "Methotrexate and Tubal Pregnancies: Direct or Indirect Abortion?". The Linacre Quarterly. SAGE Publications. 67 (1): 7–24. doi:10.1080/20508549.2000.11877563. ISSN 0024-3639. PMID 12199285. S2CID 40139581.
- Buskmiller, Cara (2017-05-06). "The Ethics of Interstitial and Cesarean Scar Ectopic Pregnancies: Four Case Studies and a Review of the Literature". The Linacre Quarterly. 85 (3): 252–269. doi:10.1177/0024363918788858. PMC 6161235. PMID 30275610.