Social and biological factors in infant mortality. III. The effect of mother's age and parity on social-class differences in infant mortality.
D001685:Biological Factors; D005260:Female; D006801:Humans; D007223:Infant; D007226:Infant Mortality; D008423:Maternal Age; D009035:Mothers; D010298:Parity; D011247:Pregnancy; D014798:Vital Statistics
D001685:Biological Factors
INFANT; MATERNITY; VITAL STATISTICS