Current Surveillance Skip to section menu The studies currently being conducted through UKOSS are: Amniotic Fluid Embolism Cirrhosis in Pregnancy High Neuraxial Block in Pregnancy Fontan and Pregnancy Impacted Fetal Head at Caesarean Section Peripartum Hyponatraemia in Pregnancy Diabetic Ketoacidosis (DKA) in Pregnancy Extremely preterm prelabour rupture of membranes (EPPROM) Antithrombin / Protein C deficiency in pregnancy Posters UKOSS Current Studies Poster - Sept 2019 UKOSS Case Definitions Poster - Sept 2019