Columbia subject headings:
Birth customs--Cross-cultural studies.
Childbirth--Cross-cultural studies.
Childbirth--Folklore--Cross-cultural studies.
Labor (Obstetrics)--Cross-cultural studies.
Obstetrics--History.
Harvard subject headings:
Birth customs--Cross-cultural studies.
Childbirth--Cross-cultural studies.
Childbirth--Folklore--Cross-cultural studies.
Labor (Obstetrics)--Cross-cultural studies.
Obstetrics--History
Princeton subject headings: