By the mid-1980s the fertility rate-the average number of children born to a woman-dropped to 1.36.

到二十世纪八十年代，生育率——一位妇女生育小孩的平均值——也降至1.36。

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It will significantly reduce the number of children born with serious abnormalities of the brain or spine and the associated disabilities.

这将大大减少出生时脑部或脊椎就严重畸形以及相关残疾的儿童数。

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The hostility is also fueled by the apparently correct belief that children born of illegal parents are a significant contributor to the total number of births in the United States.

这种敌意被理所当然认为是正确的信念助长了，即对于美国总的出生人口的数量来说，非法移民生产的孩子有着重大贡献。

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Overall the number of children born between 2003-2005 with epilepsy was 33% lower then those born in 1994-96.

BBC: 'Steep decline' in child epilepsy

The theory that public smoking bans cut the number of children born prematurely has been strengthened by new research.

BBC: Smoking ban 'cuts premature births'

But across the population the number of children born with disorders is likely to increase if this theory holds true.

BBC: Older dads linked to rise in genetic disorder