There appears to be an immunologic component to the development of preeclampsia, and diseases such as lupus or arthritis are often thought to put patients at a higher risk of developing the disease. However, having preeclampsia doesn't put you at a higher risk of developing lupus later in life. Clouding this issue is the fact that the diagnosis of lupus can be very complicated and is not always clear-cut. The morning sickness may or may not be related. I don't think you should be screened for lupus just because you have high blood pressure in pregnancy. If you are concerned about it enough, you might want to consult with your doctor about your fears so that some tests can be run.
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