Asthma Attacks in Pregnancy Tied to Health Problems
A new study from Canada says asthma attacks during pregnancy are associated with an increased risk of health problems for mothers and their babies.
Researchers looked at data on more than 100,000 pregnancies from nearly 60,000 women. The women had given birth in Ontario, Canada from 2003 to 2012.
All of the women in the study had asthma, but only some had asthma attacks during pregnancy. Asthma is a physical condition that makes breathing difficult.
The women who had asthma attacks during pregnancy were 17 percent more likely to have hypertension. They were also 30 percent more likely to have dangerously high blood pressure known as preeclampsia, the study found.
They also more often had babies with low weight, preterm babies or babies with birth defects.
"Nearly 40 percent of pregnant women decrease or stop taking asthma medication because they are worried that it could be harmful to their unborn babies," said Teresa To in a statement. To is the lead writer of the study. She is with the Hospital for Sick Children in Toronto, Canada, and the Children's Hospital of Eastern Ontario Research Institute in Ottawa.
She said the study shows that severe asthma symptoms "present a greater risk to mother and baby."
The study was not designed to prove whether or how asthma attacks during pregnancy might cause complications for mothers or babies. But it is possible asthma attacks reduce oxygen supplies for both women and their developing babies, To said.
Asthma is the most common chronic disease during pregnancy, happening in up to 13 percent of pregnancies, To and others from the research team wrote in the European Respiratory Journal.
In about one in three pregnant women, asthma worsens during pregnancy, earlier research had found.
For the current study, researchers looked at data on women through pregnancy, as well as data on their babies for up to five years. They found that children were 23 percent more likely to develop asthma in early childhood when mothers had asthma attacks during pregnancy. These children were also 12 percent more likely to have pneumonia during the first five years of life.
In addition, pregnant women who had asthma attacks were more likely to be older, and more likely to smoke or to have limited income or insecure housing, the study found.
Researchers note that one limitation of the study is that it might not always correctly identify women with uncontrolled symptoms. Some women with five or more doctor visits for asthma symptoms during pregnancy could be controlling their illness well.
Even so, the results confirm the importance of carefully watching asthma during pregnancy, Professor Jorgen Vestbo said in a statement. He leads the European Respiratory Society's Advocacy Council and is a researcher at the University of Manchester in the United Kingdom.
I'm Alice Bryant.
1.asthma attacks 哮喘发作
You know, asthma attacks are brought on by emotional stress.
2.Even so 即便如此
It was raining, but even so we had to go out.
3.chronic disease 慢性病
Asthma is a chronic disease of the airways characterized by recurrent attacks of breathlessness and wheezing.
4.looked at 查看
We all stopped dead and looked at it.
5.A new study from Canada says asthma attacks during pregnancy are associated with an increased risk of health problems for mothers and their babies.
associated with 与...有关
I haven't been associated with the project over the last year.
Dogs were also associated with healing in the ancient world.
6.The women had given birth in Ontario, Canada from 2003 to 2012.
give birth 生产；分娩
She's due to give birth at any moment.
This sow will give birth in a few days.
研究人员查看了近6万名女性的超过10万例怀孕的数据 。2003年到2012年间，这些女性在加拿大的安大略省分娩 。
所有参与研究的女性都患有哮喘，但是只有部分人在孕期哮喘发作 。哮喘是一种会导致呼吸困难的疾病 。
在孕期哮喘发作的女性患高血压的可能性增加了17％ 。研究发现，这些人患危险高血压（即子痫前期）的可能性增加了30％ 。
特雷莎·图在一份声明中表示：“近40%的孕妇减少或停服哮喘药物，因为她们担心这会对胎儿有害 。”特雷莎是这项研究的主要作者 。她任职于加拿大多伦多儿童医院和渥太华东安大略研究所儿童医院 。
该研究并不是为了证明孕期哮喘发作是否或如何对母亲或婴儿造成并发症 。但是哮喘发作有可能会减少孕妇及其腹中发育胎儿的氧气供应 。
在目前的研究中，研究人员查看了怀孕期间的女性数据，以及长达五年的婴儿数据 。他们发现，当母亲在怀孕期间哮喘发作时，儿童在幼儿期患哮喘的可能性要高出23% 。这些儿童在5岁前患肺炎的可能性也增加了12% 。
研究人员指出，该研究的一个局限是，它可能并不总是正确地识别出有失控症状的女性 。有些女性在怀孕期间因哮喘就诊五次或五次以上的可以很好地控制她们的病情 。
维斯博（Jorgen Vestbo）教授在一份声明中称，尽管如此，研究结果证实了在怀孕期间仔细观察哮喘的重要性 。他领导欧洲呼吸协会的倡导委员会，是英国曼彻斯特大学的研究员 。