Placental drainage of fetal blood at cesarean delivery and feto maternal transfusion: a randomized controlled trial.

Objective: To assess the efficacy of placental drainage of fetal blood at the time of cesarean delivery on the incidence of feto-maternal transfusion.

Methods: This randomized trial includes 86 gravid women who underwent cesarean delivery. Forty-four women were assigned to the placental drainage group and 42 to the no-drainage group.