Abnormal fetal position

Introduction Generally speaking, after 30 weeks of pregnancy, the position of the fetus in the uterus is not correct. It is longer in pregnant women and women who have loose abdominal wall. The abnormal fetal position includes breech position, transverse position, posterior position, facial position, etc., with breech and posterior occipital More common, lateral and facial position is less, fetal position abnormalities accompanied by abnormal fetal position, correction difficulties, should be used for abortion or caesarean section.

Cause

The most common abnormal fetal position is the breech position and the posterior occipital position. The transverse position and the facial position are less common. The reason is not clear and may be related to the following:

1, the fetal head is blocked in the basin, such as the head basin is not called and the placenta previa;

2, the scope of fetal activity increased, such as excessive amniotic fluid, loose maternal abdominal wall, twins and premature infants;

3, uterine malformations.

an examination

Related inspection

Obstetric B ultrasound heart monitoring

1. After 28 weeks of gestation, the abdominal position was confirmed by abdominal, vaginal and B-ultrasound examination.

2. Diarrhea diagnosis: Abdominal examination of the uterus is a vertical ellipse, the bottom of the uterus can touch the round and hard, pressing the fetal head with a floating ball. A soft, wide and irregular fetal hip can be seen above the pubic symphysis. The fetal heart sounds are most clearly heard on the left or right side of the umbilicus. B-ultrasound inspection of the fetal head under the costal margin. Above the pubic symphysis is the arm or the foot.

3. Diagnosis of the transverse position: The uterus is a horizontal ellipse, the fetal head is touched on the side of the mother's abdomen, and the pubic symphysis is relatively empty. The fetal heart sounds are most clearly on both sides of the umbilical cord. B-ultrasound examines the fetal head on one side of the mother's abdomen.

Differential diagnosis

Need to be identified with the following symptoms:

Embryonic developmental disorders: The entire process of fetal growth and development in the uterus is about 38 weeks, which is a very complex and highly coordinated physiological process. This prenatal development is called embryonic development. Embryonic development can be divided into three stages: pre-embryo, embryo, and fetal. The early development of the embryo is a relatively important period. The various organs and systems of the human body are basically formed during this period, and embryonic developmental disorders also occur at this stage. This leads to abnormal development of the embryo.

Placenta preposition: The normal placenta is attached to the posterior wall, anterior wall or side wall of the uterus. If the placenta is attached to the lower part of the uterus, even if the lower edge of the placenta reaches or covers the inner opening of the cervix, its position is lower than the first exposed part of the fetus, called the placenta preposition.

Placenta retention in the uterine cavity: 30 minutes after the delivery of the fetus, the placenta has not yet been delivered, known as placental retention, is an important cause of postpartum hemorrhage. However, if the placenta is not completely stripped from the uterine wall, although the placenta is retained, there may be no bleeding for a period of time. Therefore, the correct treatment of placental retention is important for preventing postpartum hemorrhage and reducing maternal mortality.

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