Premenopausal women seem to have a lower risk of AMI than similarly-aged men; apparently because estrogen
helps keep low-density lipoprotein (LDL) cholesterol levels lower and high-density lipoprotein (HDL) cholesterol
levels higher than levels would be without estrogen, decreases fibrinogen levels, and relaxes coronary arteries. After
menopause, estrogen levels plummet, which results in an increased risk for AMI.