What causes placenta accreta?

Placenta accreta refers to the situation where all or part of the embryo is adhered to the inner wall of the uterus and cannot separate on its own. This is called placenta accreta. All adhesions may not cause bleeding, but some adhesions may cause internal bleeding. It is caused by multifactorial endometritis, uterine wall damage, etc. Generally speaking, it means that part or all of the embryo is attached after birth. If it is due to a history of miscarriage, then the uterus is prone to scarring, which will cause adhesions. If there are adhesions right after giving birth, then you need to observe the recovery of the uterus. If the recovery is not good, you need to do a curettage.

What causes placenta accreta?

Common causes of placenta accreta

It is damage to the uterine wall caused by endometritis or several abortions. Once the problem is solved at that time, it will not have much impact on the human body. However, if you plan to get pregnant again, placenta adhesion or even embedding may occur. It is recommended not to consider getting pregnant again in the short term, and to take good contraceptive measures as much as possible.

Key causes of placenta accreta

Is there a pregnancy immediately after an intrauterine operation, such as abortion curettage or intrauterine angiography, etc., naturally the embryo is not deeply implanted, there are also unknown reasons. Generally, it cannot be detected by color Doppler ultrasound examination during pregnancy. It can only be detected during labor when the fetus is difficult to deliver. Generally, the uterine cavity should be cleaned and the fetal tissue should be removed as much as possible. After the birth, the embryo is removed cleanly, and generally there will be no abnormalities afterwards.

Distinguishing placenta accreta from other similar conditions

Incomplete placental detachment: It is common in cases of weak uterine contractions or uncoordinated uterine contractions, so that part of the embryo separates from the decidua layer of the uterus, while the other part does not separate, affecting the full contraction of the uterus, causing relaxation of part of the uterus, opening of blood sinuses on the placental detachment surface, and continuous vaginal bleeding.

Placental retention after detachment: The embryo has completely separated from the endometrium. This is mostly due to weak uterine contractions, poor abdominal muscle contraction due to poor physical condition of the pregnant woman, or a full bladder. As a result, although the embryo has completely separated from the endometrium, it remains in the uterus, further affecting uterine contractions and causing bleeding.

Embryo incarceration: Uterine contractions are not harmonious, and the area around the internal os of the uterus contracts and contracts, forming a narrow ring, which causes the embryo that has completely detached to be incarcerated in the uterine body, hindering uterine contractions and causing bleeding. If blood clots accumulate in the uterus, potential bleeding will occur, but sometimes a lot of external bleeding can also be seen.