What does eclampsia entail during pregnancy?

Eclampsia is a serious condition that occurs during pregnancy characterized by the onset of seizures and, in some cases, coma. It typically follows preeclampsia, which involves high blood pressure and signs of damage to another organ system. The seizures associated with eclampsia are a significant health concern for both the mother and the fetus. This condition requires immediate medical attention as it can lead to serious complications, including maternal and fetal morbidity and mortality.

The other options do not accurately describe eclampsia. Severe nausea and vomiting may occur in pregnancy but are not indicators of eclampsia. Continuous abdominal pain is more associated with other conditions such as labor or complications like placental abruption. A normal fetal heart rate does not pertain to eclampsia since eclampsia can cause fetal distress. Thus, the defining characteristic of eclampsia is the risk of seizures and potential for coma, making that answer correct.