The Prediction of Risk Factors of Progression of Low Implanted Placenta at 18- 24 Weeks to Placenta Previa at Term

Placenta Previa is defined as a placenta implanted in the lower segment of the uterus, presenting ahead of the leading pole of the fetus (over or near the internal os). The prevalence of placenta previa has been estimated to be approximately 0.5% of all pregnancies, and this increase correlates to the elevated cesarean section rate . In Egypt, the prevalence of placenta previa is around 1.3% in Sohag Governorate and 1.5% in Aswan region according to.

Although various studies have tried to address risk factors associated with Placenta Previa development, the etiology of placenta previa still remains obscure. Several risk actors have been identified as strong contributors to placenta previa development. It is also a significant contributor to severe postpartum hemorrhage.Risk factors include; history of previous cesarean section, advanced maternal age, history of previous abortions, high parity and substance abuse during pregnancy (cigarette smoking), placental size (multiple pregnancy), endometrial damage (previous dilatation and curettage), uterine scars and pathology (previous myomectomy or endometritis), placental pathology (marginal cord insertions and succenturiate lobes), previous placental Previa, and curiously.