Preeclampsia is a common and dangerous complication of pregnancy that causes high blood pressure and excess protein in urine. Typically, it occurs during the third trimester or very soon after birth, but there may be a simple way to help prevent it. If you’re pregnant, preeclampsia can cause kidney and liver abnormalities, blood clotting problems, headache, stroke, and even death. It makes it harder to deliver nutrients and oxygen to a growing fetus. And it’s linked to premature birth and low birthweight in babies. Yet a daily low-dose aspirin may help prevent many of these problems, according to a recent statement from the US Preventive Services Task Force (USPSTF). Who…