Downswing in births continues.
D000293:Adolescent; D000328:Adult; D001722:Birth Order; D001723:Birth Rate; D002648:Child; D005191:Family Characteristics; D005260:Female; D005843:Geography; D006801:Humans; D007231:Infant, Newborn; D008423:Maternal Age; D008875:Middle Aged; D013223:Statistics as Topic; D014481:United States