多胎妊娠早产风险高，胎儿可能出生过早而夭折。
The risk of premature delivery in multiple pregnancies is high, and babies may be born too early to survive.
虽然早产率一般被定义为在妊娠期达到37周之前的分娩，但并不能断定那样就是安全的。
But the preterm birth rate-defined as babies born before 37 weeks gestation-doesn't tell the whole story.
在英国，妊娠眩晕症是导致早产的最常见的原因之一，每年会有七万名英国妇女受其影响，它还夺走了一千个婴儿和十位母亲的生命。
One of the most common causes of premature birth in the UK, pre-eclampsia affects 70, 000 British women a year and claims the lives of up to 1, 000 babies and ten mothers.
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