A comprehensive analysis of over half a million pregnancies has found that taking antidepressants during pregnancy does not increase the risk of children developing autism or attention deficit hyperactivity disorder (ADHD). The study, conducted by researchers at the University of Hong Kong and published in the Lancet Psychiatry, analyzed data from 37 existing studies involving 600,000 pregnant women who had taken antidepressants and 25 million women who did not use them during pregnancy.
Key Findings
Before adjusting for confounding factors such as pre-existing mental health conditions, the analysis indicated that antidepressant use during pregnancy was associated with a 35% increased risk of ADHD and a 69% increased risk of autism in children. However, after controlling for these factors—including the mother's mental health and genetic influences—the association became statistically non-significant. This suggests that the increased risk is not due to the antidepressants themselves but rather to underlying factors like genetic predisposition to mental health conditions.
Expert Insights
Dr. Wing-Chung Chang, lead author and professor at the University of Hong Kong, stated: “Our study provides reassuring evidence that commonly used antidepressants do not increase the risk of neurodevelopmental disorders such as autism and ADHD in children. While all medications carry risks, stopping antidepressants during pregnancy can lead to relapse of depression, which also poses risks. For women with moderate to severe depression, the decision to continue treatment should weigh the potential harms of untreated depression against any medication risks.”
The study also found no difference in risk between high and low doses of antidepressants. Notably, children of fathers who took antidepressants and mothers who used antidepressants before but not during pregnancy also showed a similar increased risk of autism and ADHD, further supporting the conclusion that the link is driven by genetic or environmental factors rather than the medication itself.
Limitations and Implications
Limitations of the study include a lack of data on socioeconomic status, lifestyle factors, and low birth weight. Additionally, women prescribed antidepressants often have more severe depression, which may introduce bias even after adjustments. James Walker, professor emeritus at the University of Leeds, commented: “This research cuts through the noise. Women with moderate or severe depression should not stop their antidepressants out of fear of causing autism or ADHD. Untreated depression carries real risks for the mother and baby, including premature birth, postnatal depression, and bonding difficulties. For milder depression, talking therapies are usually recommended first.”
These findings underscore the importance of individualized treatment decisions during pregnancy, made in consultation with healthcare providers.
