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What can cause seizure during pregnancy?

My sister is pregnant, 27, does not have pre-eclampsia or epilepsy or high blood pressure. She had a seizure in the middle of the night, and had a seizure during her last pregnancy (but smaller). Doctors found nothing after the one in her first pregnancy. Her placenta is currently lying low but she was not put on bed rest yet. All im looking for is possibilities of what it could be.
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replied October 20th, 2011
Welcome to ehealthforum,
Seizures can be affected by hormonal changes. In general hormonal changes during pregnancy can precipitate seizure activity. If elevated blood pressure, pre-eclampsia, epilepsy, electrolyte imbalances, are ruled out, then she should consider getting her hormonal levels checked. The exact cause cannot be commented upon without examining her and going through her investigation results. She should be in regular monitoring and follow-up with her treating doctor/gynecologist and report any new/abnormal symptoms immediately.
Take care.

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