The role of maternal chronological age in prenatal and perinatal history, social support, and parenting practices of new mothers (N = 335) was examined. Primiparas of 5-month-old infants ranged in age from 13 to 42 years. Age effects were zero, linear, and nonlinear. Nonlinear age effects were significantly associated up to a certain age with little or no association afterward; by spline regression, estimated points at which the slope of the regression line changed were 25 years for prenatal and perinatal history, 31 years for social supports, and 27 years for parenting practices. Given the expanding age range of first-time parents, these findings underscore the importance of incorporating maternal age as a factor in studies of parenting and child development.
KeywordsMaternal age; maternal practices; parenting; social support When angels inform the 99-year-old Abraham that his 90-year-old wife will soon give birth, Sarah overhears and "laughed to herself saying, 'After I have grown old, and my husband is old, shall I have pleasure.'" (Genesis 18:12)
Contemporary Demographic Trends in Maternal AgeThe mean age for first births in the United States is 25.1 years and rising . This overall gradient reflects two trend lines. First, the rate of teenage motherhood is waning slightly, although the United States has the highest percentage of teen (15-19) births among industrialized nations (421,626 in 2003;Hamilton, Martin, & Sutton, 2004). Second, waxing numbers of older adult women are delaying conception, thus expanding the age range for first-time parenthood (Hamilton et al., 2004). According to the National Vital Statistics Reports , birth rates for women 25-39 increased by about 1-2% each year from 1991 to 2001, and births to women aged 35-39 and 40-44 years reached record highs in 2002, rising 31% and 43%, respectively, since 1990.
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Author ManuscriptThese demographic changes are ascribable to several factors. An array of youth sex education programs that stress both abstinence and contraception, welfare reform, the rise of a more religious and conservative generation, and an economic climate with more opportunities for women may contribute to the slight decline in the teen birthrate (McKay & Carrns, 2004). Similarly, multiple factors operate at the other end of the age continuum. The aging of the baby boom generation translates into greater absolute numbers of older women than in previous decades (Ventura, Martin, Curtin, & Mathews, 1997). Delayed marriage, the pursuit of advanced education, careerism, and high rates of divorce all postpone childbearing (Barber, 2001), and advances in birth control and assisted reproductive technologies have made it possible to delay pregnancy (Borini et al., 2004;Golombok, 2002;Lee et al., 2004;Paulson & Sachs, 1998).These demographic trends, in turn, raise questions about what effects obtain between maternal age and central issues related to first-time parenting, viz. prenatal and perinatal statu...