Inconsistent parenting and maternal smoking are "stressors" that can trigger emergence of ADHD in predisposed individuals.

Inconsistent Parenting

A parenting style characterized by unpredictable feedback and rules, leading to confusion and insecurity in children.

Maternal Smoking

The act of smoking tobacco products by a mother during pregnancy, which can lead to adverse health outcomes for the baby, including low birth weight and developmental issues.

Stressors

External pressures or events that cause stress to an individual, potentially leading to physical and psychological reactions.