New-onset seizures during pregnancy are a rare but quite challenging situation. Seizures in pregnancy result from three categories of conditions: pre-existing or new-onset epilepsy, new onset of seizures due to a non-pregnancy-related condition, and neurologic conditions either specific to or occurring quite frequently during pregnancy, especially eclampsia. Electroencephalography (EEG) and neuroimaging help to differentiate between these conditions. However, neuroimaging and treatment of pregnant patients with seizures are challenging due to the lack of randomized controlled trials in pregnant women. This article presents a clinical case of a 31-year-old primigravida woman at 29 weeks of gestation diagnosed with new-onset epilepsy which manifested with bilateral tonic-clonic seizure and slow pathological waves on the EEG with no neurologic deficits or magnetic resonance imaging abnormalities.