Was not a result of the baby boom that followed World War 2?

One significant outcome that was not a result of the baby boom following World War II was the immediate decline in birth rates in the late 1960s and 1970s. While the baby boom led to a surge in population and economic growth, it also coincided with increased access to contraception and changing societal attitudes towards family size and women's roles. This shift resulted in a subsequent decline in birth rates as families opted for fewer children.