Columbia subject headings:
Health surveys--United States.
Pregnancy--Psychological aspects.
Pregnancy.
Pregnant women--Employment.
Pregnant women--Health and hygiene.
Harvard subject headings:
Health surveys--United States.
Pregnancy--Psychological aspects
Pregnancy.
Pregnant women--Employment.
Pregnant women--Health and hygiene.
Princeton subject headings:
Health surveys--United States.
Pregnancy--Psychological aspects.
Pregnancy.
Pregnant women--Employment.
Pregnant women--Health and hygiene.