有一份关于儿童成长的调查显示，这些睡眠问题多方面影响我们孩子的健康成长，包括学习成绩，发育甚至免疫力。
And there is a growing body of research suggesting these problems are affecting many aspects of our children's health and development, including academic performance, growth and even immunity.
根据美国的研究报道，生于有不孕病史的家庭的六岁儿童出现发育问题的风险更高， 其危险率较那些生于无怀孕困难家庭的儿童要高2.7倍。
The risk of developing problems by the age of six is 2.7 times higher among children born to those with a history of infertility than in those conceived without difficulty, according to US research.
根据美国的研究报道，生于有不孕病史的家庭的六岁儿童出现发育问题的风险更高， 其危险率较那些生于无怀孕困难家庭的儿童要高2.7倍。
The risk of developing problems by the age of six is 2.7 times higher among children born to those with a history of infertility than in those conceived without difficulty, according to US research.
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