Columbia subject headings:
Childbirth--History.
Obstetrics--History.
Sex customs--History.
Women--Physiology--History.
Harvard subject headings:
Childbirth--History.
Obstetrics--History
Sex customs--History
Women--Physiology--History.
Princeton subject headings:
Childbirth--History.
Obstetrics--History.
Sex customs--History.
Women--Physiology--History.