One of the mysteries of the English language finally explained.
A period of marked increase in the birth rate resulting from children born in a previous baby boom themselves becoming parents; specifically that between the late 1970s and early 1990s, when children of the post-Second World War baby boom became parents.
1970s; earliest use found in Advocate (Newark, Ohio). From echo + boom, after baby boom.
echo boom/ˈɛkəʊ buːm/
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