In some large countries like the USA and Spain, the recession actually reversed the upward fertilitytrend.
诸如在美国和西班牙这样的大国，经济衰退实际上彻底扭转了生育上升趋势。
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Behind the fertilitytrend is a vast cultural shift from thegeneration that fought in World War II, which married early and produced thegreat baby boom of 1945 to 1965.