The 1970s baby-bust trough (1976)
After the post-war Baby Boom, U.S. fertility fell to about 1.7 children per woman in the mid-1970s, a then-record low driven by rising female workforce participation and delayed marriage.
The low deepened public anxiety about a 'population bust' that never came as sharply as feared.
Fertility rebounded modestly into the late 1980s, showing that a deep period low does not guarantee permanent collapse.
The parallel matters now because the current 1.57 reflects the same mix of delayed and foregone births, and history suggests some of today's postponed births will still happen.
