The move to replacement-level fertility is one of the most dramatic social changes in history.

人口趋向生育等值替换水平是历史最有戏剧性的社会变化。

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But recent studies have found large changes in cues and behavior when a woman is at this stage of peak fertility.

不过近期的研究已发现，处于排卵高峰期的女性在行为暗示上有明显的变化。

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Eurostat researchers caution that their projections are a "what if" scenario and do not take into account future changes in immigration policy or fertility rates that could alter the outcome.

欧共统计局警告说，他们的调查结果只是一种想设，没有考虑未来移民政策和出生率改变会带来的结果。

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Under the changes, anyone who provides gametes to a fertility clinic in the state must also provide identifying information about themselves and their medical history .

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Eating for fertility, for example, can be quickly attained through changes in diet.

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