I found the following quote from the Latter-day Center for Moral Liberalism.
The Church of Jesus Christ of Latter-day Saints considers the elective termination of pregnancy one of the most sinful practices of modern society, though abortion is not necessarily murder. The Lord has commanded, “Thou shalt not . . . kill, nor do anything like unto it” (D&C 59:6). Members of the Church must not submit to, be a party to, or perform an abortion, except in cases such as pregnancy resulting from incest or rape, or where competent medical authorities certify that the life of the mother is in jeopardy or that the fetus is so severely defective that it cannot survive birth. But even these exceptions do not justify abortion automatically. Church members are counseled that they should consider abortion in such cases only after consulting with their bishop and receiving divine confirmation through prayer. Church members who encourage, perform, or submit to an abortion are subject to Church discipline as appropriate to help them repent.
abstracted from “Abortion,” in Encyclopedia of Mormonism, ed. Daniel H. Ludlow, 4 vols. (New York: Macmillan, 1992), 1:7.
Scott Klusendorf from Life Training Institute is a pro-life apologist who debates pro-choicers. He often starts out the debate saying that if the pro-choicer can prove that the unborn child isn’t human, then he’ll have no problem becoming pro-choice as well. I think he’s safe in saying this, because the baby is clearly human, and no one has ever shown otherwise. So the question we all have to answer is whether there is ever a situation when it’s okay to murder an unborn child. It was news to me that Mormons answer in the affirmative. Apparently, there are three such situations—rape or incest, when the life of the mother is in jeopardy, or if the child is so defective he’ll be a waste of time and money to carry to full term.
I would like to say the same thing to Mormons that Scott Klusendorf says in his debates. If you can show me how the child of a rapist, a child who puts his mother’s life in jeopardy, or a child that is less likely to live isn’t human, I’m the first one to say let’s kill them. However, if you can’t show me that they’re less than human, it’s murder, and those responsible for killing those children will stand before God as murderers.
There are plenty of people who call themselves pro-choice, but still say it would be wrong to kill babies in certain situations. The only difference between Mormons and staunch pro-choicers is where they choose to draw the line.
I would urge Mormons or anyone else who is guilty of killing an inconvenient child to repent and trust in Jesus alone to forgive their sins—even murder. However, you must seek forgiveness from the true Jesus, the Creator of the universe who is the one true God.