Patient's question:
Question: When does the placenta form and will it always be present...Doctor's answer:
Low-lying placenta is a type of placenta previa. The associated factors include: 1. Endometrial lesions or damage, seen in multiple curettage procedures, multiple deliveries, history of uterine surgery, etc.; 2. Excessive placental area or the presence of (accessory placenta) or membranous placenta extending downward; 3. Delayed development of the trophoblast layer of the fertilized egg, which fails to implant promptly after reaching the uterine cavity and continues to move downward, resulting in implantation at a lower position.