Evidence map›Paper›PMID 30234728›Full record

ReviewObstetrics and gynecology2018

Marijuana Use in Pregnancy and While Breastfeeding.

Torri D Metz, Laura M Borgelt

Open access · greenAbstract readReview
In one paragraph

Review in Obstetrics and gynecology, 2018. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 76 papers, 4 of them syntheses that pooled it.

0numbers the graph read from it
0cells of the map it votes in
76citing papers in PubMed, 4 pooled it
26.5field-weighted citation impact, top 1% 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

76 citing papers in PubMed, 4 syntheses or guidelines pooled it, 177 citations in OpenAlex.

  1. Pooled it
  2. Pooled it
  3. Pooled it
  4. Perceptions about cannabis use during pregnancy: a rapid best-framework qualitative synthesis.Canadian journal of public health = Revue canadienne de sante publique · 2021
    Pooled it
  5. Article
  6. Review
  7. Review
  8. Review
  9. Article
  10. Prenatal Cannabis Use and Depressive Symptoms.Obstetrics and gynecology · 2025
    Observational
  11. American Indian women's perceptions of perinatal cannabis use.The American journal of drug and alcohol abuse · 2025
    Article
  12. Article
  13. Review
  14. Article
  15. The Effect of Cannabis Consumption During Lactation on the Macronutrient Concentrations in Breast Milk.Breastfeeding medicine : the official journal of the Academy of Breastfeeding Medicine · 2025
    Article
  16. Review
  17. Review
  18. Cannabis Use during Pregnancy: An Update.Medicina (Kaunas, Lithuania) · 2024
    Review
  19. Article
  20. A Scoping Review of Preterm Birth Risk Factors.American journal of perinatology · 2024
    Article

16 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors at 1 institution in 2 countries.

Torri D MetzDenver Health and Hospital Authority, Denver, and the University of Colorado School of Medicine and the University of Colorado Skaggs School of Pharmacy, Aurora, Colorado.
Laura M Borgelt
Twitter (United States) · US

Funding

COLORADO WRHR CAREER DEVELOPMENT CENTERK12HD001271 · NICHD · UNIVERSITY OF COLORADO DENVER · PI Saketh R Guntupalli · 1999 to 2026
$8.9M
NICHD NIH HHS K12 HD001271
6 · The paper itself

Abstract

The prevalence and perceived safety of marijuana use in pregnancy are increasing with expanding legalization. Marijuana crosses the placenta and passes into breast milk, resulting in fetal and neonatal exposure. Many women cite medical reasons for prenatal marijuana use such as nausea and vomiting of pregnancy, anxiety, and chronic pain. The scientific literature regarding marijuana in pregnancy is mixed, resulting in confusion among practitioners as to how to counsel women about risks of use. In addition, there is a paucity of literature related to marijuana use and breastfeeding. Existing pregnancy studies are predominantly retrospective cohorts with a reliance on self-report for ascertainment of exposure, which underestimates use. Many studies fail to adjust for important confounding factors such as tobacco use and sociodemographic differences. Despite the limitations of the existing evidence, there are animal and human data suggesting potential harm of cannabis use. The harms are biologically plausible given the role of the endocannabinoid system in pregnancy implantation, placentation, and fetal neurologic development. Two recent systematic reviews and meta-analyses found an association between marijuana use and adverse perinatal outcomes, especially with heavy marijuana use. In addition, three longitudinal cohort studies demonstrate a possible effect of prenatal marijuana exposure on long-term neurobehavioral outcomes. Marijuana use may be associated with growth restriction, stillbirth, spontaneous preterm birth, and neonatal intensive care unit admission. Therefore, women should be advised to refrain from using marijuana during pregnancy and lactation.

Indexed as

Breast FeedingAnimalsCannabinoidsCongenital AbnormalitiesDirective CounselingEndocannabinoidsFemaleFetal DevelopmentHumansInfant, Low Birth WeightInfant, NewbornIntensive Care Units, NeonatalMarijuana UseMedical MarijuanaPregnancyPremature BirthCannabinoidsEndocannabinoidsMedical Marijuana

Identifiers

PMID30234728
PMCPMC6370295
OpenAlexW2894899239

What OpenQuestion holds

Textmetadata
LicenceTDM
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.