Methods Spinal bifida and tethered cord syndrome are congenital malformations.

方法　脊柱裂与脊髓栓系综合征是一种先天性疾病.

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Alimentary tract duplication is a rare congenital malformations.

摘要肠胃道复制畸形是一种少见的先天性异常.

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The rate of major congenital malformations was 5.3 % among exposed infants unexposed infants, a nonsignificant difference.

接触该药的婴儿中,严重先天畸形的发生率为5.3%,而未接触的婴儿为4.9%, 无显著的统计学差异.

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The congenital malformations are associated with environmental factor, genetic factor or interactions of them.

先天畸形可因环境因素 、 遗传因素或两者的相互作用而发生.

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