What was the most likely cause of the baby boom of 1935 and 1957?

The baby boom between 1935 and 1957 was primarily driven by a combination of post-World War II economic prosperity, societal stability, and changing cultural attitudes towards family and marriage. After the war, many veterans returned home, leading to a surge in marriages and an increased desire for larger families. Additionally, improved healthcare and living conditions contributed to higher birth rates, as families felt more secure and optimistic about the future.