**Core Concept**
Neonatal seizures are a type of epilepsy that occurs in newborns, typically within the first 28 days of life. The prognosis of neonatal seizures largely depends on the underlying cause, which can be genetic, metabolic, infectious, or structural in nature.

**Why the Correct Answer is Right**
The cause of neonatal seizures plays a crucial role in determining the prognosis. Among the various causes, **hypoxic-ischemic encephalopathy (HIE)** is often associated with a relatively better prognosis. This is because HIE is often caused by birth asphyxia or perinatal hypoxia, which can be managed with supportive care, including cooling therapy, and has a potential for recovery with minimal long-term sequelae. HIE involves the activation of various cellular pathways, including the N-methyl-D-aspartate (NMDA) receptor-mediated excitatory neurotransmission, which contributes to neuronal injury.

**Why Each Wrong Option is Incorrect**
**Option B:** Metabolic disorders, such as congenital disorders of glycosylation, often have a poor prognosis due to the underlying genetic defect and the potential for long-term developmental delays.
**Option C:** Infectious causes, such as neonatal meningitis or encephalitis, can have a poor prognosis due to the risk of long-term neurological sequelae and complications.
**Option D:** Structural causes, such as congenital brain malformations or hemorrhagic strokes, often have a poor prognosis due to the potential for long-term neurological deficits.

**Clinical Pearl / High-Yield Fact**
It is essential to note that the prognosis of neonatal seizures can be improved with early diagnosis and management, including the use of anticonvulsant medications and supportive care.

**Correct Answer: A. Hypoxic-ischemic encephalopathy (HIE) is often associated with a relatively better prognosis in neonatal seizures.**