How does smoking during pregnancy affect ADHD risk? 

There is strong evidence showing a connection between smoking during pregnancy and ADHD, with prenatal exposure to tobacco increasing the risk of attention-related disorders in children. This link is particularly concerning given how smoking can interfere with early brain development. 

The development of a baby’s nervous system may be impacted by exposure to nicotine and other chemicals during pregnancy. This prenatal exposure may disrupt key brain pathways that control focus, behaviour, and emotional regulation. As a result, the link between smoking during pregnancy and ADHD becomes more evident, with studies showing higher diagnosis rates in children born to mothers who smoked while pregnant. 

In addition to cognitive effects, smoking and ADHD are also linked to poor birth outcomes, such as low birth weight and preterm delivery, both of which are associated with increased ADHD risk. 

Behavioural Risks Linked to Prenatal Smoking 

Children exposed to tobacco in the womb may display early signs of attention difficulties or hyperactivity. Below are common traits seen in these cases:

Short attention span

Struggles to stay focused on tasks or instructions, especially in group settings or classrooms. 

Emotional impulsivity

Overreactions or difficulty regulating feelings often leading to social challenges. 

Hyperactive behaviour

Excessive movement, fidgeting, or difficulty sitting still, which may signal underlying regulatory issues. 

These symptoms should encourage additional developmental evaluation, especially when paired with known prenatal exposure.  

Visit providers like ADHD Certify for personal consultations and guidance on early support strategies. 

For a deeper dive into the science, diagnosis, and full treatment landscape, read our complete guide to premature birth or low birth weight.