Many countries have reduced multiple births by limiting the number of embryos that are transferred.
许多国家已经通过限制移植胚胎数目来减少多胞胎出生情况了。
While this shift will address the problems associated with multiple births, it's not the end of the matter.
即便这项转变可以解决多胎产的问题，它也不是事情的最终解决之道。
In pigs where you have multiple births, you could have crowding or some other issue that creates the defect [later on].
猪是多胞胎，它们可能会相互拥挤或者有其他的一些问题，造成了这些缺陷。
Multiple births were excluded because even naturally conceived multiples have a high risk of complications, Romundstad says.
多胎生产被排除了，因为甚至在自然状态下，怀三胞胎也有很高的患并发症的风险。
The danger of defects from twin, triplet, and other multiple births is far greater than any risk posed by the fertility treatments themselves.
双胞胎、三胞胎以及多胞胎的各种缺陷的发生风险远较借由生殖技术获得的相应胚胎的发生风险高。
C-sections save lives in breech or multiple births, for example, or when a mother has dangerously high blood pressure or a fetal heartbeat fails.
或者在母亲血压太高或者胎儿心跳暂停的时候，剖腹产本来可以挽救生命。
Mothers of twins or triplets have almost twice the average risk of postnatal depression, a survey by the twins and Multiple Births Association showed today.
今天(英国)双胞胎和多胞胎协会所做的一个调查显示，生双胞胎或者三胞胎的母亲患产后抑郁症的风险几乎是生一个小孩的母亲患产后抑郁症风险的一倍。
That makes sense: when more children survive, parents accept that there is less need for multiple births, and they can afford to put their children through school.
其意义在于：当越来越多的孩子存活了下来，父母们生多个孩子的需求就越少，他们就有能力供孩子上学。
Single embryo transfers are also cheaper, especially when it comes to costs related to treating complications caused by multiple births, the researchers said.
研究者说，与多胚胎移植相比，接受单胚胎移植的价格也更为便宜，特别是在因接受多胚胎移植而发生并发症时。
And while multiple births represent one of the great wonders of life in their own right, they provide important clues in the mysterious case of nature versus nurture.
而当许多人生来就表现出生命的奇迹的时候，他们为许多有关先天和后天的案例提供了重要的线索。
Her two boys and two girls were healthy and doing well after being born July 6 by Caesarean section in what doctors said was a rare occurrence of multiple births.
7月6日，玛格达勒诺剖腹产生下一对男婴和一对女婴，目前，四个孩子都很健康，一切正常。医生说，这在多胞胎中还是很少见的。
Mothers of twins had more children overall compared with non-twin-bearing moms by virtue of their multiple births, but they also had more single children than moms of single babies.
双胞胎的母亲和非双胞胎的母亲相比，由于她们生育的更多，因此总的来说她们有更多的孩子。但是和只有一个孩子的母亲比起来，她们也有更多的独生子女。
According to statistics compiled by Multiple Births Canada, 60 per cent of triplets, 90 per cent of quads and 99 per cent of quintuplets in Canada are the result of infertility treatments.
加拿大多胞胎协会(Multiple BirthsCanada)收集的数据表明：加拿大60%的三胞胎，90%的四胞胎和99%的五胞胎都是治疗不育症的结果。
Assisted fertility methods are used more often and there are a larger number of older mothers, both of which tend to produce multiple births and such babies are more likely to be born early.
辅助生育措施应用频繁和众多的高龄产妇们，这些都趋向于多产和早产。
Assisted fertility methods are used more often and there are a larger number of older mothers, both of which tend to produce multiple births and such babies are more likely to be born early.
辅助生育措施应用频繁和众多的高龄产妇们，这些都趋向于多产和早产。
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