Employment during pregnancy. Legitimate live births United States-1963.
D000328:Adult; D001719:Birth Certificates; D005260:Female; D006306:Health Surveys; D006801:Humans; D007231:Infant, Newborn; D008423:Maternal Age; D009790:Occupations; D011247:Pregnancy; D012111:Residence Characteristics; D012959:Socioeconomic Factors; D013223:Statistics as Topic; D014481:United States; D014937:Work