In the United States, for example, the baby boom is generally considered to have occurred between 1946 and 1964. This period was characterized by a rapid increase in the birth rate following the end of World War II. The baby boom generation in the US is often associated with factors such as the return of soldiers from war, economic prosperity, and changing social attitudes related to marriage and family planning.
However, it's worth noting that the baby boom was not a universal phenomenon during World War II. Some countries experienced population decline or stagnation during the war due to factors such as high mortality rates, displacement, and social disruption caused by the conflict.
Therefore, while the term "baby boom" is commonly associated with the post-war period in many countries, its timing, scale, and impact were specific to each context.