Table of Contents

Effects of Out-of-Wedlock Birth on Children

The rate of nonmarital births has increased rapidly. In 1970, about 11 percent of all births were to unmarried parents; by 1990, that figure rose to 28 percent. By 2013, around 41 percent of all U.S. births—roughly 1.6 million births per a year—were to unmarried parents.1) The largest share of nonmarital births are to women aged 20 through 24 years. Unlike in past decades, most out-of-wedlock births today—58 percent—are to cohabiting couples.2) Therefore, while a majority of these children have their biological mother and father present at birth, many spend most of their life in a single-parent family.

From the very beginning, children born outside of marriage have life stacked against them. While many single mothers work wonders and raise their children well despite the obstacles they encounter, for many others the challenge is too great and their children suffer the consequences.

1. Health at Birth

Out-of-wedlock birth is related to poor health at birth. An overview of the professional literature concluded that the main reason for America’s low international standing on infant mortality was the rate of the young mothers giving birth outside of marriage.3) Nicholas Eberstadt of the Washington-based American Enterprise Institute makes the same case for Washington, D.C., the infant mortality capital of the country.4) Infants born to younger women are more likely to be born prematurely, and to die in the neonatal period.5) The 2013 National Vital Statistics Report found that the mortality rate for infants of unmarried mothers was 77 percent higher than the rate for infants of married mothers.6) According to researchers from The National Center for Health Statistics: “Both black and white unmarried women had a substantially higher risk of having infants with very low or moderately low birth rates.”7) Very low birth weight babies are at high risk for serious complications and their treatment add significantly to the Medicaid cost of births to welfare mothers.

2. Development

The absence of married parents is related to delayed development in early childhood. Different risks associated with out-of-wedlock birth arise as the child grows older. The professional scientific literature amply documents the relationship to delays in development. For example, children born out-of-wedlock tend to be shorter and have smaller heads.8) Their cognitive (especially verbal) development is lessened.9) Many of these children have problems in controlling their activity (popularly called “hyperactivity”). This lack of control is usually an indication of problems in learning that will arise later in the child’s development.10) The effect on boys is greater, at least in the early years.11)

3. Academic Performance

The absence of married parents is related to poor academic performance in school. This is amply documented in the professional literature.

A University of Illinois study of adults who were born outside of marriage found that the longer the time spent in a single-parent family the less education attained at all income levels of the parent. This significantly reduces the job and income attainments of these individuals and also reduces the overall performance of the nation’s economy. Those who have lived in single-parent homes as preschoolers are most affected. And once again, the study indicated, boys are more affected than girls.12) Explains Barbara Dafoe Whitehead, a researcher at the Manhattan-based Institute for American Values:

According to a study by the National Association of Elementary School Principals, 33 percent of two-parent elementary school students are ranked as high achievers, as compared with 17 percent of single-parent students. The children in single-parent families are more likely to be truant or to have disciplinary action taken against them. Even after controlling for race, income and religion, scholars find significant differences in educational attainment between children who grow up in intact families and children who do not.13)

In sharp contrast with parents of children born out-of-wedlock, married parents have higher expectations of their children, even when the children have the same intelligence and performance abilities.14)

4. Emotional and Behavioral Stability

The absence of married parents risks emotional and behavioral problems that compound during childhood. The impact of out-of-wedlock birth and growing up in a single-parent family on the child is significant and can be permanent. These children are more likely to suffer from:

About one-third of children born to unmarried mothers, or whose parents separate, become part of a two-parent family within five years.17) However, children from these “blended” families (families with step siblings in them) tend to have even more difficulties.18) As Whitehead explains:

In general the evidence suggests that remarriage neither reproduces nor restores the intact family structure, even when it brings in more income and a second adult into the household…Other difficulties seem to offset the advantages of extra income and an extra pair of hands…Step-families disrupt established loyalties, create new uncertainties, provoke deep anxieties, and sometimes threaten a child’s physical as well as emotional security.19)

Many of these problems exist even after controlling for family income and education. Hence, the decline of intact married families generates social and monetary poverty for future generations. The root cause of these ills lies in the lack of married parents. Therefore, the effect of a married mother and father are quite pronounced.20)

1) Carmen Solomon-Fears, “Nonmarital Births: An Overview,” Congressional Research Services Report (2014). Available at http://fas.org/sgp/crs/misc/R43667.pdf Accessed September 4, 2015.
2) Carmen Solomon-Fears, “Nonmarital Births: An Overview,” Congressional Research Services Report (2014). Available at http://fas.org/sgp/crs/misc/R43667.pdf Accessed September 4, 2015.
Steven L. Nock, “Marriage as a Public Issue,” The Future of Children 15, no. 2 (2005): 26.
Child Trends Data Bank, “Births to Unmarried Women”, Indicators on Child and Youth (July 2014).
3) David Lester, “Infant Mortality and Illegitimacy,” Social Science Medicine 35, no. 5 (1992): 739-740.
4) See two articles by Nicholas Eberstadt on infant mortality rates in Washington, D.C.: “In the District, Children Without a Chance: The Startling Facts of Life and Death in the Infant Mortality Capital of America” and “Parents and the District’s Endangered Children,” The Washington Times, February 22 and 23, 1994.
5) V. Sharma, J. Katz, L. C. Mullany, S. K. Khatry, S. C. LeClerq, S. R. Shrestha, and J. M. Tielsch, “Young Maternal Age and the Risk of Neonatal Mortality in Rural Nepal,” Archives of Pediatrics & Adolescent Medicine 162, no. 9 (2008): 828–835. doi:10.1001/archpedi.162.9.828
Christine A. Bachrach, and Karen Carver in the introduction to Outcomes of Early Childbearing, National Institutes of Health, National Institute of Child Health and Development (NICHD) Conference Proceedings, May 1992.
6) T.J. Mathews and Marian F. MacDorman, “Infant Mortality Statistics from the 2010 Period Linked Birth/ Infant Death Data Set,” National Statistics Reports 62, no. 8 (2013): 8.
7) Joel C. Kleinman and Samuel S. Kessel, “Racial Differences in Low Birth Weight,” New England Journal of Medicine 317, (1987): 749-753.
T.J. Mathews and Marian F. MacDorman, “Infant Mortality Statistics from the 2010 Period Linked Birth/ Infant Death Data Set,” National Statistics Reports 62, no. 8 (2013): 8.
8) Jane Wadsworth et al., “Teenage Mothering: Child Development at Five Years,” Journal of Child Psychology and Psychiatry 25, no. 2 (1984): 303-313.
9) A. Walsh, “Illegitimacy, Child-Abuse and Neglect, and Cognitive Development,” Journal of Genetic Psychology 15, (1990): 279-285;
J.J. Card, Long Term Consequences for Children Born to Adolescent Parents Palo Alto, California: American Institutes for Research Final Report to NICHD, 1977.
J.J. Card, “Long Term Consequences for Children of Teenage Parents,” Demography 18 (1981): 137-156;
Jane Wadsworth et al., “Teenage Mothering: Child Development at Five Years,” Journal of Child Psychology and Psychiatry 25, no. 2 (1984): 303-313.
10) J. Brooks-Gunn and Frank Fustenberg Jr., “The Children of Adolescent Mothers: Physical, Academic and Psychological Outcomes,” Developmental Review 6, (1986): 224-225.
11) J.J. Card, Long Term Consequences for Children Born to Adolescent Parents, Palo Alto, California: Final Report to NICHD, American Institutes for Research 1977;
J.J. Card, “Long Term Consequences for Children of Teenage Parents,” Demography 18, (1981): 137-156;
J. Brooks-Gunn and Frank Fustenberg Jr., “The Children of Adolescent Mothers: Physical, Academic and Psychological Outcomes,” Developmental Review 6, (1986): 224-225.
12) Sheila F. Krein and Andrea H. Beller, “Educational Attainment of Children From Single-Parent Families: Differences by Exposure, Gender and Race,” Demography 25, (May 1988): 221-234.
13) Barbara Dafoe Whitehead, “Dan Quayle Was Right,” The Atlantic Monthly (April 1993): 47-70.
14) Christina M. Gibson-Davis, Kathryn Edin, Sara McLanahan, “High Hopes But Even Higher Expectations: The Retreat From Marriage Among Low-Income Couples,” Journal of Marriage and Family 67, no. 5 (Dec 2005): 1301.
Maxine S. Thompson, Karl L. Alexander, and Doris R. Entwisle, “Household Composition, Parental Expectations and School Achievement,” Social Forces 67 (1988): 424-451.
15) Robert Rector, “Marriage: America’s Greatest Weapon Against Child Poverty,” Heritage Foundation Special Report #117 on Poverty and Inequality, September 2012. Available at http://www.heritage.org/research/reports/2012/09/marriage-americas-greatest-weapon-against-child-poverty.
16) E.M. Hetherington and B. Martin, “Family Interactions,” in H.C. Quay and J.S. Werry (eds.), Psychopathological Disorders of Childhood (New York: John Wiley & Sons, 1979), 247-302.
17) Greg J. Duncan and Saul D. Hoffman, “Welfare Benefits, Economic Opportunities and Out-of-Wedlock Births Among Black Teenage Girls,” Demography 27, no. 4 (1990): 519-535.
18) Nicholas Zill and Charlotte A. Schoenborn, “Developmental, Learning, and Emotional Problems: Health of Our Nation's Children, United States 1988,” Advanced Data from Vital and Health Statistics of the National Center for Health Statistics no. 190, (November 1990).
Nicholas Zill and Carolyn C. Rogers, “Recent Trends in the Well-Being of Children in the United States and Their Implications for Public Policy” in Andrew J. Cherlin, ed., The Changing American Family and Public Policy (Washington, D.C.: The Urban Institute, 1988), 90-91.
19) Barbara Dafoe Whitehead, “Dan Quayle Was Right,” The Atlantic Monthly, April 1993, 47-70.
20) Robert Rector, “Marriage: America’s Greatest Weapon Against Child Poverty,” Heritage Foundation Special Report #117 on Poverty and Inequality, September 2012. Available at http://www.heritage.org/research/reports/2012/09/marriage-americas-greatest-weapon-against-child-poverty.


This entry draws heavily from Rising Illegitimacy: America's Social Catastrophe.