Governments learned several ways to reduce births. The worst used physical force. Others attached penalties to an additional child, set targets for clinics, subsidized contraception, or changed whether an abortion could legally occur. These acts belong to different moral categories and worked through different mechanisms. They share one demographic feature: each could interrupt a birth at a single point in the chain.
The bluntest cases began with a numerical target. Once officials decide that too many children are being born, a pregnancy becomes a failure in a plan.
China made that logic national policy. The government promoted later marriage and wider birth spacing during the 1970s, then moved in 1980 toward one child for much of the population. Enforcement reached from ruinous fines to forced abortion and sterilization, with officials also detaining relatives to make people comply. The Congressional-Executive Commission on China documented these abuses long after the policy began. A national quota eventually reached an individual woman’s body.
The damage outlasted the rule. Son preference under a strict birth limit contributed to a badly distorted sex ratio, while a generation of only children entered adulthood with fewer siblings to share the care of aging parents. China ended the one-child regime in 2016 and later permitted three children, but births still fell from 9.54 million in 2024 to 7.92 million in 2025. Removing the prohibition could not restore the people who had never been born or the habits that had formed around small families.
When the state decides who should reproduce
The United States pursued a narrower version of reproductive control during the twentieth century. More than thirty states adopted eugenic sterilization laws. In Buck v. Bell in 1927, the Supreme Court allowed Virginia to sterilize Carrie Buck, and tens of thousands of Americans were eventually sterilized under such programs. The state claimed authority not merely over how many children should exist, but over whose descendants should exist.
Carrie Buck, Virginia, 1924 Carrie Buck (left) and her mother Emma at the Virginia Colony for Epileptics and Feebleminded, photographed before Buck v. Bell. The Supreme Court allowed Virginia to sterilize her in 1927. via Wikimedia Commons
Population control later became part of international development policy. American foreign aid financed family-planning programs abroad while governments and large institutions treated rapid population growth as an obstacle to development. Some programs supplied information and methods that women wanted. Others attached official rewards, penalties, or performance targets to contraceptive acceptance. Pressure could move from donor to ministry to clinic until a program described as voluntary did not feel voluntary to the person in the examination room. Later U.S. policy formally rejected coercion and acceptor targets after abuses made the danger hard to ignore.
Coercion is not the only policy question. A government can refrain from forcing anyone to avoid pregnancy and still influence fertility by funding, promoting, or normalizing the means of preventing conception or ending pregnancy. Voluntary use and state sponsorship are different policy categories. The earlier causal account addressed the acts themselves; this page asks what access, funding, and law did to births.
A birth can also be prevented without force
The federal Title X program, enacted in 1970, made voluntary contraception more available to low-income Americans. Contraception prevents conception, and research on the early expansion of federally funded family planning found substantial reductions in childbearing among poor women who gained access. No coercion is required for access to change the number of births, and no coercion is required for public policy to favor one reproductive outcome over another.
Abortion changes births at a later point. States that legalized abortion before Roe v. Wade experienced about a 5 percent decline in births relative to comparison states, and later research found that much of the decline represented fewer lifetime births rather than births merely delayed. After Dobbs returned abortion law to elected governments, births rose in states enforcing complete or six-week bans, with travel and abortion pills carrying part of the effect across state lines. Law does not determine every pregnancy decision. It does change how many pregnancies end in live birth.
The mechanisms should not be blurred. Forced sterilization and forced abortion are acts of state violence. Voluntary access is not a softer version of a quota. Public funding, legal access, prohibition, and force can all affect births while remaining very different exercises of power. The moral distinctions established earlier remain in place; the policy record here shows that government need not compel an act in order to favor it or change its prevalence.
The asymmetry appears when policy changes direction. A contraceptive can prevent a conception this month, an abortion can end a pregnancy already underway, and a quota backed by force can stop a birth with terrible efficiency. Reversal asks much more: a future mother and father have to meet, commit, make room for a child, and begin early enough to have the family they want. Governments trying to raise fertility inherit a chain where governments trying to lower it often needed only a lever.
Citations
- Congressional-Executive Commission on China, Annual Report 2016, “Population Control”, 2016.
- National Bureau of Statistics of China, Statistical Communiqué of the People’s Republic of China on the 2025 National Economic and Social Development, 2026.
- Supreme Court of the United States, Buck v. Bell, 274 U.S. 200, 1927.
- Alexandra Minna Stern, “Sterilized in the Name of Public Health”, American Journal of Public Health 95, no. 7, 2005.
- U.S. Agency for International Development, Population Policy Paper, 1982.
- Congressional Research Service, Family Planning Program Under Title X of the Public Health Service Act, 2018.
- Martha J. Bailey, “Reexamining the Impact of Family Planning Programs on U.S. Fertility”, American Economic Journal: Applied Economics 4, no. 2, 2012.
- 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.
- Suzanne Bell and others, “Estimated Changes in Births Following State Abortion Bans”, JAMA 331, no. 14, 2024.