Columbia subject headings:
Harvard subject headings:
Childbirth--Statistics--Great Britain--Childbirth--Statistics--Periodicals.
Fertility, Human--Statistics--Great Britain--Fertility, Human--Statistics--Periodicals.
Great Britain--Statistics, Vital--Periodicals.
Princeton subject headings:
Childbirth--Great Britain--Statistics--Periodicals.
Fertility, Human--Great Britain--Statistics--Periodicals.
Great Britain--Statistics, Vital--Periodicals.
Periodicals.