This is a domain of the Building Optimal Strategies to Enhance Parent and Infant Wellbeing in CHD (BOND) platform trail. BOND is a randomized, multifactorial, adaptive platform trial that seeks to optimize parent wellbeing and infant development following prenatal or neonatal diagnosis of congenital heart disease (CHD). The primary objective of this domain is to determine the effects of a prenatally initiated, virtually administered mental health intervention, called HeartGPS, on maternal mental health and infant development following prenatal CHD diagnosis.