1. Le Comité de médecine foeto-matemelle, Société des obstétriciens et gynécologues du Canada, Gestion de la grossesse prolongée, Opinion du Comité. J Soc Obstet Gynaecol Can 1994:16(4):1581-6
2. Postterm pregnancy: induction or surveillance?;Crowley,1989
3. Prospective Risk of Stillbirth;Feldman;Obstet Gynecol,1992
4. Routine ultrasonography in early pregnancy;Neilson,1992
5. Townsend L Studies in prolonged pregnancy I. The Incidence of prolonged pregnancy;Beischer;Am J Obstet Gynecol,1969