Modern fertility decline is partly a history of control. Contraception makes conception less likely, sterilization intends to make it permanently unlikely, and abortion ends a pregnancy that has already begun. Grouping them as “reproductive choice” can conceal both their different mechanisms and their different moral objects.
The demographic mechanism is only the first question. The number of births affected, the reason for an individual act, the moral judgment of the act, and the law that should govern it are separate questions. Keeping them separate makes it possible to be direct without letting a statistic do moral work it cannot do.
Contraception and postponement
Contraceptive methods work in different ways. Hormonal methods commonly suppress ovulation or thicken cervical mucus; condoms create a barrier; copper intrauterine devices impair sperm and prevent fertilization. Male and female sterilization block sperm or eggs from meeting. Their common practical purpose is to permit intercourse while making conception less likely.
In 2022–2023, 54.3 percent of American females ages fifteen to forty-nine were currently using contraception. The prevalence figure does not tell us how many births would otherwise have occurred or whether use prevented an unwanted pregnancy, delayed a wanted child, or spaced births a couple later had. It does establish how normal intentional control has become.
The timetable became controllable Enovid was approved for contraceptive use in the United States in 1960. Reliable contraception allowed pregnancy to be postponed while sexual relationships continued, changing the path into marriage and parenthood as well as the number of unintended births. Via the Science History Institute and Wikimedia Commons
Control can protect health, allow spacing after a difficult birth, prevent a pregnancy a couple believes it cannot sustain, and give women greater power over sex and timing. Those are the strongest goods claimed for contraception, and any fair argument has to recognize them.
The moral question concerns the means, not whether every couple must seek a pregnancy at every moment. Periodic abstinence and contraception can share an intention to avoid conception for a time. They do not do the same thing. Abstinence governs whether the couple engages in sex during a fertile period. Contraception alters the sexual act or its conditions so that the couple can engage in it while excluding its procreative capacity.
I judge that separation to be a loss. Sex joins bodies through an act ordered by its nature toward generation, even when conception is unlikely or not sought. Deliberately making the act infertile treats fertility as a defect to neutralize rather than part of what the spouses give each other. The judgment does not make illness, exhaustion, poverty, or fear unreal. It says that a serious reason to avoid pregnancy does not make every means of avoidance morally equivalent.
Sterilization makes the same separation more final. Its direct purpose is not to postpone one pregnancy but to close reproductive capacity as a continuing condition. Medical procedures that remove or disable reproductive organs to treat disease must be distinguished from procedures chosen precisely to make a healthy system infertile.
These judgments do not by themselves dictate criminal law, insurance rules, or public subsidy. They do challenge the assumption that whatever expands voluntary control is therefore a neutral good. A culture in which contraception is the default setting of sexual life also changes the sequence followed elsewhere in this chapter: pregnancy normally arrives only after an affirmative decision to stop preventing it. Every reason for delay can continue operating while the reproductive years pass.
Abortion concerns a life already begun
Abortion is not another method of contraception. It acts after conception, when a new developing human organism already exists. Its demographic effect is direct: a pregnancy that might have ended in live birth instead ends before birth. Around 73 million induced abortions occur worldwide each year, according to the World Health Organization’s model for 2015–2019.
That total cannot be subtracted mechanically from births. Some pregnancies would miscarry; legal changes can affect sexual behavior, contraception, travel, and reporting. Historical research on American states that legalized abortion before Roe v. Wade estimated a roughly 5 percent decline in births relative to comparison states, with later work finding that much of the reduction persisted in completed fertility. The size of an effect in one legal setting should not be applied to every country or year.
The moral argument does not depend on the aggregate effect. Abortion deliberately ends an existing developing human life. Dependence, size, location, and stage of development change what care is possible; they do not convert the unborn child into a nonhuman object. A language of fertility rates can become antiseptic at precisely this point. The act concerns a particular life and a woman whose pregnancy may involve fear, abandonment, coercion, illness, or grave medical danger.
The strongest autonomy argument is that no person should be legally compelled to use her body to sustain another, especially after violence or when pregnancy threatens her health. The strongest equality argument is that women cannot participate freely in public life if pregnancy creates obligations the state forces them to bear. Those arguments name real burdens. I do not think bodily autonomy includes authority intentionally to end an innocent human life. Justice requires protection of the child and concrete support for the mother rather than making one expendable for the other.
Hard cases require medical and legal precision that this causal chapter cannot settle. Treatment directed at saving a pregnant woman’s life can involve the foreseeable loss of the child without making the child’s death the chosen means. Laws can be badly drafted or cruelly administered. Moral opposition to abortion does not remove the need to distinguish emergency care, miscarriage treatment, maternal-fetal conflict, criminal penalty, and support after birth.
For this chapter’s narrower purpose, reproductive control alters fertility at two points. Contraception and sterilization prevent conception; abortion prevents an existing pregnancy from ending in birth. The next page examines the opposite effort: using technology to recover a child after conception has become difficult.
Citations
- World Health Organization, Mechanisms of Action and Effectiveness of Contraceptive Methods, 2023.
- Kimberly Daniels and Joyce Abma, “Current Contraceptive Status Among Females Ages 15–49: United States, 2022–2023”, National Center for Health Statistics, 2025.
- Colleen Nugent and Anjani Chandra, “Infertility and Impaired Fecundity in Women and Men in the United States, 2015–2019”, National Health Statistics Reports, no. 202, 2024.
- World Health Organization, “Abortion”, 2025.
- Phillip Levine and others, “Roe v. Wade and American Fertility”, American Journal of Public Health 89, no. 2, 1999.
- Elizabeth Ananat, Jonathan Gruber, and Phillip Levine, “Abortion Legalization and Lifecycle Fertility”, Journal of Human Resources 42, no. 2, 2007.