Baby Boom refers to the dramatic increase in fertility from 1942 to 1957 in the US. It was caused by delayed marriages and childbearing during depression years, a surge in prosperity, a demand for suburban single-family homes and new optimism about the future.(婴儿潮指的是1942年至1957年美国生育率的急剧上升。这是由大萧条时期的延迟结婚和生育、繁荣的激增、对郊区独户住宅的需求以及对未来的新乐观主义造成的。)