Identification of all fetal nucleated cells in maternal blood using PRINS technique Kada Krabchi, Macoura Gadji, Ju Yan, Régen Drouin Address of authors: Service of Genetics, Department of Paediatrics, Faculty of Medicine and Health Sciences, Université de Sherbrooke, 3001 12 th Avenue North, Sherbrooke, Quebec, Canada J1H 5N4 Running title: Identification of fetal nucleated cells in maternal blood Key words: Primed in situ labeling, fetal nucleated cells, maternal blood, non- invasive prenatal diagnosis. Correspondence to: Régen Drouin Service of Genetics, Department of Paediatrics, Faculty of Medicine and Health Sciences, Université de Sherbrooke, 3001, 12 th Avenue North, Sherbrooke, Quebec, Canada J1H 5N4 Tel.: (819) 820-6827 Fax:(819) 564-5217 Email: Regen.Drouin@USherbrooke.ca