Researchers found that those women who had not breast-fed were much more likely to have calcification or plaque in their coronary artery, aorta and carotid artery. When calcifications and plaque build up in the arteries, blood flow can be reduced, and, if enough of these deposits build up, they can cause a heart attack or stroke.
Researchers at the University of Pittsburgh Center for Research on Health Care had previously looked at breast-feeding’s effect on older women. Their study found that post-menopausal women who had breast-fed were less likely to report having heart disease. Another study on breast-feeding from a different research group recently reported in the journal Diabetes that women who breast-fed were less likely to develop metabolic syndrome, a clustering of risk factors that indicate an increased risk for heart disease.
The current study included women who had at least one baby. At the time of the study, they were 45 to 58 years old, had never been diagnosed with heart disease and had no known symptoms of heart disease.
The researchers found that 32 percent of the women who had not breast-fed had coronary artery calcification, compared with 17 percent of the breast-feeding moms. The researchers found calcifications in 39 percent of the aortas of women who hadn’t breast-fed, versus 17 percent of the women who had. They also found plaque deposits in the carotid artery of 18 percent of the women who had not breast-fed and 10 percent of those who had.
After adjusting the data for socioeconomic status, family history and lifestyle factors, heart disease risk factors and body mass, the researchers concluded that women who had not breast-fed were five times more likely to have aortic calcifications than women who consistently breast-fed.
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