Brown Bag Seminar: Parenthood and the divergence between subjective and biological wellbeing

We examine how the transition to parenthood affects subjective and biological wellbeing, using longitudinal data from the UK Household Longitudinal Study linked to biomarkers and DNA methylation. Event-study and fixed-effects models reveal a distinct temporal decoupling between these dimensions. New parents experience immediate declines in subjective wellbeing—specifically regarding leisure, income satisfaction, and self-assessed health. Conversely, parents exhibit more favorable biomarker profiles across immune, cardiovascular, and metabolic systems, alongside a slower pace of biological aging. While subjective penalties peak when children are young, physiological advantages emerge gradually and persist into later adulthood. Robustness tests confirm these divergent patterns are not driven by socioeconomic strain or psychological distress, which cause convergent deterioration across subjective and biological domains. Instead, parenthood generates a temporal decoupling where subjective experience and biological adaptation follow distinct trajectories. These findings emphasize the necessity of integrating social-science and biological perspectives to understand how the demands of caregiving are physically embedded over the life course.