What are the cause of seizure/convulsion in pregnancy?

Causes of seizure/convulsion in pregnancy

• Epilepsy 
• Cerebral neoplasm
• Cerebral haemorrhage
• Eclampsia
• Haemolysis, elevated liver enzymes and low platelets (HELLP)
• Thrombotic thrombocytopenic purpura
• Cerebral vein thrombosis secondary to hyperviscosity 
• Hypoglycemia
• Electrolyte disturbances associated with hyperemesis gravidarum
• Stroke

Source: 

• Clinics in Obstetrics - 623
• Davidson's Principles and Practice of Medicine 23rd Edition; page: 1275