<prompt> Risk factor for abruptio placentae are all except-High birth orderThrombophiliaSmokingCannabis abuse  <response>: Ans. is d i.e., Cannabis abuse Abruptio placentaeo It is one form antepartum hemorrhage where the bleeding occurs due to premature separation of normally situated placenta.o The prevalence is more with high birth order 5 or moreAdvancing agePoor socio economic conditionMalnutrition and smokingo Hypertension in pregnancy is the most important predisposing factor.o Other predisposing conditions are :TraumaSudden uierine decompressionShort cordSupine hypotension syndromePlacental anamolySick placentaFolic acid deficiencyUterine factor - placenta over septate uterus or with submucosal fibroidTorsion of uterusCocaine abuseThrombophiliasPrior abruption 