Advantages of the placenta at the bottom of the uterus

A normal placenta should be attached to the bottom of the uterus and the anterior wall of the side wall. These are all normal phenomena. However, because the placenta is attached to the lower part of the uterus, people think that this kind of placenta is beneficial. In fact, it is not a placenta previa. The placenta is too forward, which may make premature birth and miscarriage more likely. Therefore, special attention should be paid to it in normal times.

What is placenta previa?

The normal attachment site of the placenta is on the posterior, anterior or lateral wall of the uterine body. If the placenta is attached to the lower part of the uterus or covers the internal os of the cervix and is lower than the presenting part of the fetus, it is called placenta previa. Placenta previa is one of the main causes of bleeding in late pregnancy and a serious complication during pregnancy.

There are 4 types of placenta previa, depending on where the placenta covers the uterus:

1. Complete placenta previa: The placenta completely covers the cervical opening.

2. Partial placenta previa: The placenta covers part of the cervix.

3. Marginal placenta previa: The edge of the placenta just reaches the internal os of the cervix.

4. Low-lying placenta: The placenta is located in the lower part of the uterus.

In addition, expectant mothers who smoke may also experience placenta previa. However, as the uterus grows, the placenta usually moves up, and only some people will continue to have a "placenta previa" in the late stages of pregnancy.

Who is most likely to develop placenta previa ?

Most women with placenta previa have no obvious risk factors. But you are more likely to have placenta previa if any of the following conditions are present:

1. You had placenta previa in your previous pregnancy.

2. You are pregnant with two or more babies this time.

3. You have had a caesarean section before (the more caesarean sections you have had before, the greater the risk).

4. You have undergone other uterine surgeries before (such as uterine cavity diagnostic curettage or uterine myomectomy, artificial abortion curettage, etc.).

5. You smoke.

6. Your endometrium is inflamed.

7. You use cocaine.

8. At the same time, the more children you have and the older you are, the greater your risk of placenta previa.

Common symptoms of placenta previa Recurrent painless bleeding in late pregnancy is the main symptom of placenta previa.

The first bleeding of complete placenta previa occurs earlier, with frequent bleeding and a larger amount. The first bleeding of marginal placenta previa occurs later, usually between 37 and 40 weeks of pregnancy or around the onset of labor, and the amount is also less. The first bleeding time and amount of partial placenta previa are between the two. Placenta previa without vaginal bleeding may also be seen.