Dr. Rommel's work as an epidemiologist focuses on the exposome and its link to the development of adverse health outcomes, including suboptimal pregnancy and birth outcomes, as well as psychopathology. She is particularly interested in reproductive events, including pregnancy and menopause. She has been instrumental in setting up two separate birth cohorts, and has conducted analyses in several existing birth cohorts to study the outcomes of early life exposure to, for example, maternal mental illness, medication, inflammation and COVID-19 infection. In addition, she applies cognitive-neurophysiological designs to study risk and protective factors for psychopathology, and the biological mechanisms underlying it.