Olof Stephansson

Olof Stephansson is a senior researcher and group leader at the Clinical Epidemiology Unit (KEP), Karolinska Institutet, focusing on reproductive, perinatal, and pediatric epidemiology. His work utilizes Swedish healthcare registries and quality registers to investigate risk factors, interventions, and medical management during pregnancy and childbirth.

• Key research areas: maternal obesity, preeclampsia prediction, climate change impacts, neonatal neurodevelopment, IBD in pregnancy, and labor management
• Funded by: Swedish Research Council, NIH, FORTE, NordForsk, and Karolinska Institute
• Collaborates with: Stanford, Oregon Health, University of British Columbia, London School of Hygiene, University of Witwatersrand

His group (2014-present) manages the Swedish Pregnancy Registry and conducts randomized trials like the Oneplus study on midwifery models. Recent publications (2024-2025) analyze maternal BMI effects on offspring sleep, labor duration risks, and vaccine safety in pregnancy.