I do not know of any information that suggests that stress is part of the disease. In part, I think women may believe this because to the term "hypertension." But, psychological tension in not the issue. Hypertension refers to the tension in the wall of the blood vessel - the pressure. The response to attribute their psychological state with causation is an attempt to find control. It is also an attempt to assume responsibility and blame for the prior outcome. "If only I had not worked so hard.... had not been stressed..."
A large part of the work in caring for a woman with a prior bad outcome is to address and recognize that ubiquitous sense of maternal responsibility, the sense of responsibility that leads to guilt and self blame.
So, all that said, no stress does not lead to preeclampsia. This is a disease - for the most part, an individual woman has little control over the disease. I try very hard to dissuade women from taking on the personal responsibility for their preeclampsia and the impact of the disease.
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