Study: Cannabis Use During Pregnancy Not Associated with Differences in Child Neurodevelopment

By Sechat

A recent study published in the Pediatric and Perinatal Epidemiology journal found no links between cannabis use during pregnancy and different neurodevelopment outcomes in children. 

The research, which followed the children into adulthood, at 20 years of age, is especially positive, considering that 4.2% of pregnant women report marijuana use, a figure that is increasing every day. In some countries, pregnant women who use cannabis may face legal consequences, such as imprisonment and removal of children from maternal care.

Cannabis During Pregnancy

The use of marijuana during pregnancy is a controversial issue. Some praise its ability to relieve symptoms such as morning sickness and pain, while others fear that the plant's chemicals may negatively affect the child's development. 

Some studies have found significant differences in neurodevelopment of children exposed to cannabis in the womb, such as ADHD, anxiety, and autism, while others did not find an association. However, experts point out issues in the methodology of many of these studies, such as a low number of participants or inconsistent observational projects.

One of the main challenges in research is considering other factors, such as the use of other drugs by parents or pre-existing medical conditions. More recent studies have taken these factors into account and did not find an association between prenatal cannabis use and autism or ADHD.

However, estimates indicate that the heritability of autism and ADHD may be high, meaning the likelihood of passing on these conditions to children is significant. This can introduce bias in studies, as parents with a higher likelihood of passing on these conditions may also be more likely to use marijuana during pregnancy.

Another recent study, conducted by Columbia University and the University of Western Australia, was a breakthrough in research. They controlled a wide range of parental characteristics and followed the children for a long period of time. Based on the data collected, they did not find an association between prenatal cannabis use and lower neuropsychological performance in children. However, the study has its limitations. One of them is the fact that the potency of cannabis and its forms of use have changed over the decades. 

The researchers conclude that more research is needed to better understand the effects of prenatal marijuana exposure on neurodevelopment. While we await more conclusive data, experts still recommend that women avoid using marijuana during pregnancy.