1 Title page: Coagulation abnormalities in children with uncorrected congenital heart defects seen at a teaching hospital in a developing country. Short title: Coagulation abnormalities in children with uncorrected congenital heart defects Authors: Omotola O. Majiyagbe 1,2 , Adeseye M. Akinsete 1,3 , Titilayo A. Adeyemo 4 , Ekanem N. Ekure 1,3 , Christy A. N. Okoromah 1,3 . 1 Department of Paediatrics, Lagos University Teaching Hospital, Idi-Araba, Lagos, Nigeria. 2 Department of Paediatrics, Massey Street Children’s hospital, Lagos Island, Lagos, Nigeria. 3 Department of Paediatrics, College of Medicine of the University of Lagos, Idi-Araba, Lagos, Nigeria. 4 Department of Pathology, College of Medicine of the University of Lagos, Idi-Araba, Lagos, Nigeria. Current address: Department of Paediatrics, Massey Street Children’s hospital, Lagos Island, Lagos, Nigeria. *Corresponding author E-mail: omotolamajiyagbe@yahoo.com (OM) Contributor Role Omotola O. Majiyagbe ROLES: Conceptualization, Data curation, Formal analysis, Investigation, Methodology, Project administration, Resources, Writing - original draft, Writing – review & editing Adeseye M. Akinsete ROLES: Methodology, Project administration, Supervision, Writing – review & editing Titilayo A. Adeyemo ROLES: Methodology, Project administration, Resources, Supervision, Validation, Writing – review & editing Ekanem N. Ekure ROLES: Conceptualization, Methodology, Project administration, Resources, Supervision, Writing – original draft, Writing – review & editing Christy A. N. Okoromah