Ahmed is an epidemiologist whose research leverages multicohort studies and innovative statistical methods to examine the determinants of physical and mental health trajectories across the life course, with a particular focus on prenatal and early life influences on developmental trajectories. His main research interests include understanding the effects of assisted reproductive technology on offspring health, and determinants and life course outcomes of prenatal, childhood, and pubertal growth. His other areas of primary interest include examining the determinants of cardio-metabolic, musculoskeletal, and mental health trajectories. He has expertise (and interest) in the application (and development) of novel statistical methods for the analysis of longitudinal trajectories in large cohort studies, including pooled multicohort studies. He currently works on the EU Horizon 2020 LongITools project, where he leads a package of research into the effects of environmental exposures on adolescent health trajectories. He previously worked on the Horizon 2020 LifeCycle project where he helped set up the EU Child Cohort Network.