I tried to research the increase of birthrate and marriage of the US during WW2 (1939-1945), but the result just shows statistics after the war and the baby boom. Thus, they make me confused. I really need help!
I found this on WIKI, I need more information about the birthrate and marriage during the war, not after.
Marriage and motherhood came back as prosperity empowered couples who had postponed marriage. The birth rate started shooting up in 1941, paused in 1944–45 as 12 million men were in uniform, then continued to soar until reaching a peak in the late 1950s. This was the "Baby Boom.
In a New Deal-like move, the federal government set up the "EMIC" program that provided free prenatal and natal care for the wives of servicemen below the rank of sergeant. Housing shortages, especially in the munitions centers, forced millions of couples to live with parents or in makeshift facilities. Little housing had been built in the Depression years, so the shortages grew steadily worse until about 1949, when a massive housing boom finally caught up with demand. (After 1944 much of the new housing was supported by the G.I. Bill.) Federal law made it difficult to divorce absent servicemen, so the number of divorces peaked when they returned in 1946. In long-range terms, divorce rates changed little.