https://libertariansforlife.com/about-libertarians-for-life/
The Libertarian Case Against Abortion
One popular misconception is that libertarianism as a political principle supports choice on abortion. And major elements within the libertarian movement (the Libertarian Party, for example) take abortion-choice stands.
Nonetheless, libertarianism’s basic principle is that each of us has the obligation not to aggress against (violate the rights of) anyone else — for any reason (personal, social, or political), however worthy. That is a clearly pro-life principle.
Recognizing that, and seeing the abortion-choice drift within the libertarian movement, Libertarians for Life was founded in 1976 to show why abortion is a wrong under justice, not a right.
Defending Abortion Abolition from Libertarianism
1. Human offspring are human beings, persons from conception, whether that takes place as natural or artificial fertilization, by cloning, or by any other means.
2. Abortion is homicide — the killing of one person by another.
3. One’s right to control one’s own body does not allow violating the obligation not to aggress. There is never a right to kill an innocent person. Prenatally, we are all innocent persons.
4. A prenatal child has the right to be in the mother’s body. Parents have no right to evict their children from the crib or from the womb and let them die. Instead both parents, the father as well as the mother, owe them support and protection from harm.
5. No government, nor any individual, has a just power to legally “de-person” any one of us, born or preborn.
6. The proper purpose of the law is to side with the innocent, not against them.
