This paper provides a detailed account of fertility levels and trends
in England and Wales since 1938, with a briefer coverage of a much lon
ger time-span. The paper is concerned both with the measurement of fer
tility and with understanding the observed fertility behaviour. We lam
ent and correct the failure of demographers to apply measurement tools
available since the 1950s to the analysis of fertility in England and
Wales, with a particular emphasis on adjustment of period measures an
d period parity progression ratios and show how some of the grosser er
rors of analysis and interpretation might have been avoided by earlier
use of these approaches. We also relate these estimates to more recen
t ones. Once a clearer account of trends has been established, the pap
er goes on to reinterpret and explain the baby boom and baby bust. The
conclusion looks at future prospects for fertility.