What is the meaning of the placental base wall?

Patient's question:

Medical Description: At 34 weeks + of pregnancy, I had an ultrasound, and it showed that the placenta is located at the fundal wall. Previously, all my ultrasounds showed it was at the posterior wall. What does "fundal wall" mean? Is it dangerous? The doctor didn't say anything to me. Is it placenta previa? I'm very worried.
History of Treatment and Effect: Had threatened miscarriage, underwent treatment to prevent it.
Desired Help: What does "fundal wall" mean? Will I have a premature birth?

Doctor's answer:

You are currently attached to the fundus of the uterus, which is normal for the fetus and does not affect its development or delivery. Only when the placenta is positioned below the fetal presenting part, known as placenta previa, there may be painless vaginal bleeding, which is relatively dangerous for both the fetus and the pregnant woman. Placenta attachment to the uterine fundus refers to the fertilized egg implanting at the bottom of the uterus and developing there. Naturally, the placenta also grows at the bottom of the uterus, in a normal position, and generally does not lead to miscarriage. So, don't worry!

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