Action Points
- Infants exposed to cannabis in utero had a better risk of lesser birth weight and a a lot more compared to doubled risk of requiring a NICU remain compared along with unexposed infants, according to a small meta-analysis.
- Note that studies included in the analysis did not account for some crucial confounders, such as tobacco use, alcohol use, and maternal socioeconomic status.
Women that used cannabis throughout pregnancy had a better likelihood (compared along with non-users) of side neonatal outcomes, such as reasonable birthweight, and a better likelihood of NICU admission, a small meta-analysis found.
In a random-effects model, infants exposed to cannabis in utero had a better risk of lesser birth weight compared along with infants along with no exposure (pooled odds ratio 1.77, 95% CI 95% CI 1.04-3.01), reported Jayleen KL Gunn, PhD, of the University of Arizona in Tucson, and colleagues.
Gunn and colleagues additionally calculated that infants exposed to cannabis in utero had a a lot more compared to doubled risk of requiring a NICU remain compared along with unexposed infants (pooled OR 2.02, 95% CI 1.27-3.21), they wrote in BMJ Open.
There were 24 studies included in this review representing 19 unique case-control, cross-sectional, or cohort studies. 10 studies were from the U.S., 5 from Canada, and three from Australia. Meta-analyses were conducted on outcomes along with three or a lot more studies.
Gunn and colleagues discovered no increased risk associated along with cannabis usage for various other infant outcomes, such as:
- Neonatal length
- Gestational age
- Head circumference
- Preterm birth
Katrina Mark, MD, of the University of Maryland School of Medicine in Baltimore, that was not involved along with the analysis, characterized it as an “excellent” systematic review bringing focus to this crucial subject.
Nevertheless, she said, the conclusions do not offer a lot clinical assistance since the available research failed to account for substantial confounding factors.
“My problems along with the outcomes are not because of a design flaw of their systematic review, however pretty flaws in the available literature,” she wrote in an email to MedPage Today.
“The main conclusion that I attract from this review is that there is a paucity of well made research on this incredibly crucial topic,” said Mark.
Gunn and colleagues agreed, citing the honest truth that the outcomes of the couple of available studies are frequently conflicting, since they consist of participants that have actually been exposed to various other illicit drugs.
“much less is known regarding the effects of cannabis on fetal growth and development, or its effects on pregnant women,” they wrote. “The data summarized right here might be helpful in guiding policy, method and future research on the rewards and harms associated along with cannabis usage throughout pregnancy.”
In addition to illegal drugs, Mark and the authors agree that the included studies did not account for some crucial confounders, such as tobacco use.
“Offered that cannabis usage is frequently discovered in conjunction along with tobacco use, it is essential to have the ability to divide the effects of these two to find out the real harms of cannabis,” said Mark. “A second confounder is maternal socioeconomic status, which is incredibly difficult to regulate for and can easily be a risk factor for side pregnancy outcomes as well.”
When examining maternal outcomes, Gunn’s group discovered that smoking marijuana throughout pregnancy was associated along with increased maternal anemia risk (pooled OR 1.36, 95% CI 1.10-1.69) compared along with mothers that did not smoke. However, they discovered no association between cannabis usage and a lot more severe maternal outcomes, such as maternal diabetes, premature labor, or hyperemesis gravidarum.
The authors said that finding an increased risk of anemia was not surprising, Offered that many countries do prenatal screening for anemia. They include that a study examining increased odds of anemia throughout pregnancy had the largest sample size in their meta-analysis (8,350 participants), thus accounting for the greatest weight in the meta-analysis.
“It is recommended that these study outcomes be interpreted along with caution until future studies are completed,” they wrote. “a lot more data is required to find out whether there is any type of association between maternal anemia and usage of cannabis throughout pregnancy.”
Co-author Cara Christ, MD, of the Arizona Department of Healthiness Services in Phoenix, told MedPage Today via email that while pregnant women could incentive from education on the potential adverse effects of using cannabis throughout pregnancy, further research in to the topic is required.
“outcomes from this study demonstrate that higher quality studies in the location of cannabis and maternal and fetal Healthiness are needed,” she said. “Being able to consider fetal and maternal outcomes for mothers that usage just cannabis and not alcohol or tobacco will certainly tips identify potential side effects of cannabis on pregnancy.”
This study was supported in portion by the Arizona Department of Healthiness Services.
The authors disclosed no conflicts of interest.
