Sorry, you are wrong on that point.
The Catholic Church recognize the rare need to protect the life of the Mother, and supports actions that give “equal protection to both” -—
Deliver the baby, even if premature, and try to keep the baby alive!
"The inalienable right to life of every innocent human individual is a constitutive element of a civil society and its legislation:
'The inalienable rights of the person must be recognized and respected by civil society and the political authority. These human rights depend neither on single individuals nor on parents; nor do they represent a concession made by society and the state; they belong to human nature and are inherent in the person by virtue of the creative act from which the person took his origin. Among such fundamental rights one should mention in this regard every human being's right to life and physical integrity from the moment of conception until death.'(79) 'The moment a positive law deprives a category of human beings of the protection which civil legislation ought to accord them, the state is denying the equality of all before the law. When the state does not place its power at the service of the rights of each citizen, and in particular of the more vulnerable, the very foundations of a state based on law are undermined. . . As a consequence of the respect and protection which must be ensured for the unborn child from the moment of conception, the law must provide appropriate penal sanctions for every deliberate violation of the child's rights.' (80) 2274 Since it must be treated from conception as a person, the embryo must be defended in its integrity, cared for, and healed, as far as possible, like any other human being. But today, in many people's consciences, the perception of its gravity has become progressively obscured. The acceptance of abortion in the popular mind, in behaviour and even in law itself, is a telling sign of an extremely dangerous crisis of the moral sense, which is becoming more and more incapable of distinguishing between good and evil, even when the fundamental right to life is at stake. Given such a grave situation, we need now more than ever to have the courage to look the truth in the eye and to call things by their proper name, without yielding to convenient compromises or to the temptation of self-deception. In this regard the reproach of the Prophet is extremely straightforward: "Woe to those who call evil good and good evil, who put darkness for light and light for darkness" (Is 5:20). Especially in the case of abortion there is a widespread use of ambiguous terminology, such as "interruption of pregnancy", which tends to hide abortion's true nature and to attenuate its seriousness in public opinion. Perhaps this linguistic phenomenon is itself a symptom of an uneasiness of conscience. But no word has the power to change the reality of things: procured abortion is the deliberate and direct killing, by whatever means it is carried out, of a human being in the initial phase of his or her existence, extending from conception to birth.
No circumstance, no purpose, no law whatsoever can ever make licit an act which is intrinsically illicit, since it is contrary to the Law of God which is written in every human heart, knowable by reason itself, and proclaimed by the Church."
Ok..wait a minute..I misread your post...you are correct in the sense of delivering early or removing Fallopian tubes. But that is not abortion. Abortion is the direct killing of an innocent pre-born human being. And the Church (as I have just shown) teaches that there are no circumstances where a Catholic can support provisions that allow for abortion (eg. rape, incest, medical reasons). Hench..no compromise.