A comparative study of delivery patterns and reproductive efficiency in groups of Negro and Caucasian women.
D044383:Black People; D036861:Delivery, Obstetric; D005260:Female; D006801:Humans; D007231:Infant, Newborn; D007615:Kansas; D008297:Male; D011247:Pregnancy; D011644:Puerperal Disorders / Q000453:epidemiology; D012098:Reproduction; D012737:Sex Factors; D012959:Socioeconomic Factors; D044465:White People; D001741:Black or African American