对于总生育率，目前仍存有争议。
1970年总生育率为4.45，世界上一般家庭都会有四到五个孩子。
In 1970 the total fertility rate was 4.45 and the typical family in the world had four or five children.
根据兰德公司2005年的一份研究，34年来欧洲总生育率已低于替代人口所必需的水平。
Europe's total fertility rate has been below the level needed to replace the population for about 34 years, according to a 2005 Rand Corp.study.
他解释说，1950年总生育率为5.8，而1980年巨幅下降至2.3，略微高于人口更替水平的底线。
The total fertility rate had been 5.8 in 1950, he notes, and had declined sharply to 2.3 by 1980, just above replacement level.
全国所有的女性群体中，总生育率也都在下降；只有一个例外，那就是年龄超过40岁的妇女，生育率在升高。
The total number of births also has been dropping, as have birth rates among all women except those 40 and older.
男人总希望女人年轻和阴柔，这反过来表明了高生育率。
Men consistently want women who show signs of youth and femininity, which in turn indicate high fertility.
15 - 19岁年轻妈妈的生育量，占到全国总生育量的10%，她们也并不是唯一一个生育率受到影响的人群。
Teenage moms, who account for about 10 percent of the nation's births, are not unique.
15 - 19岁年轻妈妈的生育量，占到全国总生育量的10%，她们也并不是唯一一个生育率受到影响的人群。
Teenage moms, who account for about 10 percent of the nation's births, are not unique.
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