There are numerous reports of fetal seizure activity.

Fetal seizure activity was reported by one mother at 28 weeks of gestation as rapid, repetitive fetal movements. Ultrasound of her fetus at 30 weeks of gestation revealed tonic clonic movements of the fetal trunk and extremities [1]. Abrams and coworkers documented fetal seizures with rapid, repetitive limb movements noted on several occasions and lasting 30-60 seconds in a 32 week old fetus[ 2].

In a review on the subject the most common cause of fetal seizures appeared to be congenital anomalies (seven of 13), mainly of the central nervous system (six of seven) [3]

 SEE ALSO:

UOG videoclip: Fetal seizures observed on ultrasound can guide diagnosis and treatment of neonatal epileptic encephalopathy
Ultrasound in Obstetrics & Gynecology

REFERENCES
1. Jung E, Lee BY, Huh CY.Prenatal diagnosis of fetal seizure: a case report.J Korean Med Sci. 2008 Oct;23(5):906-8. PMID:18955803
2. Abrams LA, Balducci J.Fetal seizures: a case study.Obstet Gynecol. 1996 Oct;88(4 Pt 2):661-3 PMID:8841243
3. Patane L, Ghidini A.Fetal seizures: case report and literature review.J Matern Fetal Med. 2001 Aug;10(4):287-9. PMID:11531157