Natality statistics analysis.
D000293:Adolescent; D000328:Adult; D005260:Female; D005298:Fertility; D006801:Humans; D007223:Infant; D007231:Infant, Newborn; D008297:Male; D011247:Pregnancy; D011647:Puerto Rico; D013223:Statistics as Topic; D014481:United States; D014798:Vital Statistics; D014900:West Indies