Long-term effects of prenatal cannabis exposure from childhood through adulthood
Prenatal cannabis exposure is linked to subtle but lasting effects on memory, externalizing behaviors, and substance use that persist into adulthood.
Quick Facts
What This Study Found
Across longitudinal studies, prenatal cannabis exposure showed remarkably consistent associations with externalizing behaviors like delinquency and substance use that persisted into adulthood. Effects on memory and academic achievement were subtle but enduring. Early cannabis initiation played a key role in pathways to adult problems.
Key Numbers
Review found some evidence for restricted growth at birth but not long-term growth effects. Consistent findings for externalizing behaviors across studies despite different demographics and measurement approaches.
How They Did This
Narrative review of prospective, longitudinal studies examining developmental outcomes of prenatal cannabis exposure, with discussion of methodological considerations.
Why This Research Matters
With increasing cannabis use, potency, and social acceptance during pregnancy, understanding the long-term developmental effects on children is increasingly important.
The Bigger Picture
Animal studies show THC directly affects brain development by activating endocannabinoid systems, altering neurotransmitter release and brain plasticity in pathways underlying cognition, motivation, and behavior regulation.
What This Study Doesn't Tell Us
Difficult to isolate cannabis effects from other prenatal exposures, socioeconomic factors, and postnatal environment. Self-reported cannabis use may underestimate exposure.
Questions This Raises
- ?How does increasing cannabis potency affect prenatal exposure outcomes?
- ?What role does timing and route of exposure play in developmental effects?
Trust & Context
- Key Stat:
- Consistent externalizing behavior effects across multiple longitudinal studies
- Evidence Grade:
- Reviews multiple longitudinal studies with consistent findings, though confounding factors remain difficult to control.
- Study Age:
- Published in 2022, reviewing decades of longitudinal research.
- Original Title:
- Long-term effects of prenatal cannabis exposure: Pathways to adolescent and adult outcomes.
- Published In:
- Pharmacology, biochemistry, and behavior, 214, 173358 (2022)
- Authors:
- De Genna, Natacha M(6), Willford, Jennifer A, Richardson, Gale A(5)
- Database ID:
- RTHC-03794
Evidence Hierarchy
Summarizes existing research on a topic.
What do these levels mean? →Frequently Asked Questions
What were the most consistent findings across studies?
Externalizing behaviors like delinquency and substance use showed remarkably consistent associations with prenatal cannabis exposure across studies, even with different demographics and measurement methods.
Did prenatal cannabis exposure affect physical growth?
There was some evidence for restricted growth at birth, but no evidence of long-term effects on physical growth.
Read More on RethinkTHC
Cite This Study
https://rethinkthc.com/research/RTHC-03794APA
De Genna, Natacha M; Willford, Jennifer A; Richardson, Gale A. (2022). Long-term effects of prenatal cannabis exposure: Pathways to adolescent and adult outcomes.. Pharmacology, biochemistry, and behavior, 214, 173358. https://doi.org/10.1016/j.pbb.2022.173358
MLA
De Genna, Natacha M, et al. "Long-term effects of prenatal cannabis exposure: Pathways to adolescent and adult outcomes.." Pharmacology, 2022. https://doi.org/10.1016/j.pbb.2022.173358
RethinkTHC
RethinkTHC Research Database. "Long-term effects of prenatal cannabis exposure: Pathways to..." RTHC-03794. Retrieved from https://rethinkthc.com/research/de-2022-longterm-effects-of-prenatal
Access the Original Study
Study data sourced from PubMed, a service of the U.S. National Library of Medicine, National Institutes of Health.
This study breakdown was produced by the RethinkTHC research team. We analyze and report published research findings without making health recommendations. All interpretations are based solely on the published abstract and study data.