Columbia subject headings:
Contraception--Complications--United States--Statistics.
Harvard subject headings:
Contraception
Contraception--Complications--United States--Statistics.
Contraception--United States--Statistics.
Contraception--United States.
Princeton subject headings:
Contraception--Complications--United States--Statistics.
Contraception--United States--Statistics.
Contraception--United States.
Contraception.