From the Centers for Disease Control and Prevention. State-specific changes in singleton preterm births among black and white women--United States, 1990 and 1997.
D000328:Adult; D001741:Black or African American / Q000706:statistics & numerical data*; D005260:Female; D005865:Gestational Age; D006801:Humans; D007231:Infant, Newborn; D007234:Infant, Premature; D007752:Obstetric Labor, Premature / Q000453:epidemiology; D011247:Pregnancy; D014481:United States / Q000453:epidemiology; D044465:White People / Q000706:statistics & numerical data*