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...early (before 37 completed weeks of pregnancy) and/or too small (with birth weight of less than 2,500 grams). Black infants are two to three times as likely as their white counterparts to be born prematurely and/or with low birth weight. Premature or low-birth weight infants who survive beyond infancy are far more likely than other infants to suffer major developmental problems, including cognitive, behavioral, and physical deficits during childhood, with lasting consequences in adulthood. They also have poorer prospects for employment and wages as adults. Prematurity and low birth weight (together referred to as adverse birth outcomes) also predict poor adult health, including diabetes, high blood pressure, and heart disease, all of which raise risks of disability and premature mortality. Caregiving to chronically ill and/or disabled survivors of adverse birth outcomes is a tremendous economic burden on families and society.
A growing body of research has been conducted in recent years into the causes of the racial disparities. The research has examined a wide range of possible factors, including differences in prenatal care, differences in women's health before they become pregnant, and infections. This research has produced useful insights but has not identified a clear cause for racial disparities. More recently, researchers have hypothesized a role for stress and adverse experiences throughout life, not just during pregnancy, as possible explanations. Much greater research investment is necessary if we are going to solve the puzzle of why racial disparities in birth outcomes persist.
At least in one major area there is now a strong scientific consensus: Differences in prenatal care are unlikely to explain racial disparities in prematurity and low birth weight. Black/white disparities in receipt of prenatal care have narrowed markedly over time, particularly with major expansions of Medicaid maternity care coverage beginning around 1990, without concomitant narrowing of birth-outcome disparities. In...
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