Although an increased risk of coronary heart disease has been demonstrated among women with high gravidity/parity, the mechanism by which this association may be mediated is unclear. One possible pathway that has been suggested is that pregnancy and child rearing may result in changes in factors such as stress or lifestyle. This hypothesis was tested in a sample of 541 middle-aged women who participated in a prospective study of the effects of menopause on behavioral and biological cardiovascular risk factors. Married women generally reported less chronic stress, less perceived stress, and more structural support than did unmarried women. However, the findings in this study indicated no consistent relationship between parity and stress or parity and social support in this group of middle-aged women. Only unmarried women with more children reported a higher number of life events than did women with fewer children.
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