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A new study by Chinese researchers found that women who gave birth are more likely to develop heart disease and stroke than those who have not yet done so.
Previous studies have shown that women usually have changes in their vascular properties, blood volume, and heart rate during pregnancy. However, the impact of pregnancy on subsequent heart disease has been debated.
Researchers at the Huazhong University of Science and Technology, based in central China's Hubei Province, examined 10 studies to determine whether pregnancy was related to the risk of cardiovascular disease.
The study involved about three million women worldwide and more than 150,000 people were diagnosed with heart disease or stroke over the next six to 52 years.
The researchers found that childbirth increased by 14% the risk of heart disease and stroke.
In addition, there was a significant badociation between the number of pregnancies and the risk of cardiovascular disease.
The incidence of cardiovascular disease in women increased by four percent each time they gave birth, regardless of their weight, diabetes, hypertension, smoking status and income level.
Each delivery increased the risk of coronary heart disease by 5% and stroke by 3%.
Wang Dongming, senior researcher of the study, thought that pregnancy could cause inflammation of the body and accumulation of fat around the abdomen, in the blood and arteries. These changes can have a permanent impact on the cardiovascular system, resulting in an increased risk of heart disease and stroke.
But he said that women can do a lot to prevent cardiovascular disease.
The researcher suggested stopping smoking, doing more exercise, eating healthy and controlling her weight to improve her future health.
The study was published in the journal European Society of Cardiology.
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