Evidence map›Paper›PMID 29054513›Full record

Observational studyEpilepsy research2017

Maternal and fetal outcomes associated with vagus nerve stimulation during pregnancy.

Anne Sabers, Dina Battino, Erminio Bonizzoni, John Craig, Dick Lindhout, Emilio Perucca, Sanjeev V Thomas, Torbjörn Tomson, Frank Vajda

Abstract readObservational Study
PubMed Publisher
In one paragraph

Observational study in Epilepsy research, 2017. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 9 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
9citing papers in PubMed, 1 pooled it
1.5field-weighted citation impact, top 18% of its field
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

9 citing papers in PubMed, 1 synthesis or guideline pooled it, 28 citations in OpenAlex.

  1. Pooled it
  2. Stimulating discussion: neuromodulation for migraine in pregnancy.Current opinion in obstetrics & gynecology · 2026
    Article
  3. Article
  4. Review
  5. Neuromodulation for Headache Management in Pregnancy.Current pain and headache reports · 2025
    Review
  6. Review
  7. Article
  8. Article
  9. Review
4 · The record

Corrections and comments

5 · Who and what money

Authors and funding

9 authors at 8 institutions in 6 countries.

Anne SabersThe Epilepsy Clinic, Department of Neurology, Rigshospitalet-Blegdamsvej, DK 2100, Copenhagen, Denmark. Electronic address: anne.sabers@regionh.dk.
Dina BattinoEpilepsy Center, Department of Neurophysiology and Experimental Epileptology, I.R.C.C.S. Neurological Institute "Carlo Besta" Foundation, Milan, Italy. Electronic address: dina.battino@istituto-besta.it.
Erminio BonizzoniDepartment of Clinical Sciences and Community Laboratory of Medical Statistics, Biometry and Epidemiology 'GA Maccacaro', University of Milan, Milan, Italy. Electronic address: erminio.bonizzoni@gmail.com.
John CraigBelfast Health and Social Care Trust,Grosvenor Road, Belfast, Ireland. Electronic address: john.craig@belfasttrust.hscni.net.
Dick LindhoutDepartment of Genetics, University Medical Center Utrecht, Utrecht & Stichting Epilepsie Instellingen Nederland (SEIN), Heemstede, The Netherlands. Electronic address: d.lindhout@umcutrecht.nl.
Emilio PeruccaDepartment of Internal Medicine and Therapeutics, University of Pavia, and Clinical Trial Center, C. Mondino National Neurological Institute, Pavia, Italy. Electronic address: perucca@unipv.it.
Sanjeev V ThomasDepartment of Neurology, Sree Chitra Tirunal Institute of Medical Sciences and Technology, Trivandrum, Kerala State, India. Electronic address: sanjeev@sctimst.ac.in.
Torbjörn TomsonDepartment of Clinical Neuroscience Karolinska Institutet, Stockholm, Sweden. Electronic address: torbjorn.tomson@karolinska.se.
Frank VajdaDepartments of Medicine and Neurology, University of Melbourne, Royal Melbourne Hospital, Melbourne, Australia. Electronic address: vajda@netspace.net.au.
Fondazione IRCCS Istituto Neurologico Carlo Besta · ITKarolinska Institutet · SERigshospitalet · DKSree Chitra Thirunal Institute for Medical Sciences and Technology · INThe Royal Melbourne Hospital · AUUniversity Medical Center Utrecht · NLUniversity of Milan · ITUniversity of Pavia · IT

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

objectiveTo access the effect of vagus nerve stimulation (VNS) on the outcome of pregnancy.

methodsWe used the International Registry of Antiepileptic Drugs and Pregnancy (EURAP) and its network to search for women receiving adjunctive VNS during pregnancy. Data on maternal and fetal outcomes were extracted from the registry databases and outcomes were evaluated.

resultsTwenty-six pregnancies were identified in 25 women. All women were exposed to a relative high VNS stimulation level (mean duty cycle 18%, range 5%-51%). Most women had seizures during pregnancy and almost 70% were on antiepileptic drug (AED) polytherapy. The proportion of women with obstetrical interventions was 53.9% (95% confidence interval [CI] 33.4%-73.4%) which was higher compared to the EURAP average (48.2%; 95% CI 47.2%-49.1%). One infant (3.9%; 95% CI 0.1%-19.6%) was born with a major malformation (unilateral congenital glaucoma), which is within the range expected among offspring of AED-treated women.

conclusionAlthough the present series of VNS-exposed pregnancies is the largest reported to date, the sample size is insufficient to draw any firm conclusions on the safety of VNS in pregnancy but the findings suggest an increased rate of obstetrical interventions, and no clear signal of VNS-related teratogenicity.

Indexed as

Vagus Nerve StimulationAdultAnticonvulsantsCohort StudiesCombined Modality TherapyEpilepsyFemaleGlaucomaHumansInfant, NewbornPregnancyPregnancy ComplicationsPregnancy OutcomeRegistriesRiskTeratogenesisAnticonvulsantsEpilepsyObstetrical interventionsPregnancyTeratogenicityVagus nerve stimulation

Identifiers

PMID29054513
OpenAlexW2766608246

What OpenQuestion holds

Textmetadata
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.