Malpositioned fetus

Introduction The correct order of normal output should be first from the head. If the lower body is produced first, even the shoulders, arms and other parts are first produced, which is called "the fetal position is not correct." The most common is the so-called breech position, that is, the direction of the buttocks toward the cervix and the birth canal. Others such as oblique or transverse position (shoulders or trunks facing the birth canal) are less, but the risk is not small. This is only the most rough classification. In fact, only the first child in the back of the head is the easiest way to produce, and other methods are likely to cause more or less danger or prolonged labor during the production process.

Cause

As for the cause of fetal malposition, the size of the gestational week, the size and shape of the pelvis, the size of the placenta in the uterus and the position of the implantation, the multiple abdominal muscles, the abdominal muscles, the multiple pregnancy, the amniotic fluid is abnormal, the umbilical cord is too short. Whether there are intrauterine tumors (such as etc.) or congenital dysplasia of the uterus (such as double-horned uterus or intrauterine decidua) and other factors. But in most cases, the cause of malposition is not necessarily categorized, which is the so-called unexplained cause.

an examination

Related inspection

Gynecological ultrasound examination of fetal thoracic and knee position examination fetal heart monitoring

1, B-ultrasound check the position of the fetus in the 7 and a half months after pregnancy.

2, the fetal position found before 7 months of pregnancy is not correct, as long as the observation can be strengthened. Because before the 30th week of pregnancy, the fetus is still relatively small compared to the uterus, and the mother's intrauterine amniotic fluid is more, the fetus has room for activity, it will correct the fetal position by itself, and most of them can naturally turn into the "head position" after 30 weeks of pregnancy. However, in general, if the fetal position is not correct during the 30-34 weeks of pregnancy, it needs to be corrected. During pregnancy, fetal position will not adversely affect the mother and child, but it is one of the common factors that cause dystocia.

Differential diagnosis

Differential diagnosis of fetal position error:

1. Abnormal fetal position: abnormal fetal position generally refers to the position of the fetus in the uterus after 30 weeks of pregnancy, and the pregnant woman and the maternal woman who are seen in the abdominal wall are longer. Abnormal fetal position includes breech position, transverse position, posterior occipital position, and facial position. More common in the breech position, and the horizontal position harms the mother and baby. Because abnormal fetal position will bring different degrees of difficulty and danger to childbirth, early correction of fetal position is of great significance for the prevention of dystocia.

2, abnormal fetal position: generally refers to the 30-week pregnancy, the position of the fetus in the uterus is not correct, longer in pregnant women with abdominal wall and maternal, abnormal fetal position including breech, transverse position, posterior position, face position, etc. The breech position and the posterior position of the pillow are more common, the transverse position and the facial position are less, and the abnormal fetal position is accompanied by abnormal fetal position. If the correction is difficult, the abortion or caesarean section should be used.

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