MedicalResearch.com Interview with: Anders Hviid M.Sc.,Dr.Med.Sci. Head of Department (acting), Professor of Pharmacoepidemiology, Department of Epidemiology Research Statens Serum Institut MedicalResearch.com:  What is the background for this study?  Response: An unusually low number of extremely preterm births have been observed in some countries during the initial covid-19 lockdowns. We speculated that this could be because of fewer infections, reduced activity levels, less stress etc. These are also factors that change with the seasons, and we hypothesized that extremely preterm birth might be associated with seasonality. (more…)