This is an automatically translated article.
The article was professionally consulted by Doctor Head of Obstetrics and Gynecology Department - Department of Obstetrics and Gynecology - Vinmec Hai Phong International General Hospital.
Fetal frontal position and anterior fontanel position is one of the abnormalities of the fetal position, which can cause premature rupture of membranes, rupture of the uterus, and even threaten the life of the pregnant woman and the fetus. Therefore, the detection and treatment need to be done accurately and timely to avoid complications for both mother and baby.
1. The fetus is on the forehead
The frontal position of the fetus is a sign of fetal abnormalities.
1.1 What is the forehead fetus?
The frontal position of the fetus is the frontal position of the fetus in front of the upper waist, the intermediate position between the crown and the face. The general opinion is that this is a bad position because it cannot pass through the diagonal diameter of the waist, so the frontal position cannot deliver vaginally (in the case of a vaginal birth, when the fetus is very small), so the cesarean section can be performed. indicated to avoid complications for pregnant women and fetuses.
All factors that interfere with fetal head bowing can be the cause of fetal frontal abnormalities, mainly due to:
Maternal narrow pelvis is considered a common cause. most encountered; Another cause of frontal position during labor can be multiple births, so frontal position is more common in those who have given birth; Uterus deviated from the axis of the upper waist; The fetus is too big, the umbilical cord is wrapped around the neck; The fetus is deformed.
1.2. Handling when the fetus is on the forehead
The frontal position of the fetus is one of the abnormal positions because the head position is not good and the back is not good, making the labor process more difficult. Because it can cause premature rupture of membranes, rupture of the uterus, even threaten the life of the pregnant woman and the fetus, so early detection and treatment should ensure the following principles:
When the fetus is full term, If the baby is at normal weight and the diagnosis is clear or there are signs suggestive of the frontal position, the cesarean section should be performed immediately because the fetus cannot pass through the mother's pelvis. Can lay the lower lane, so it is necessary to know the mechanism of laying the throne. But do not be subjective because the birth process is very long and takes strength, so it must be closely monitored. In the case when the water has not broken, the position is loose, it is best to wait and watch, because it is possible that the fetal position will turn into a crown or face position during labor, so a vaginal birth is possible. Note: Absolutely do not make the fetal head bow better because it is easy to break the amniotic fluid, prolapse the placenta. When the water has broken, the cesarean section must be switched immediately. Note: All cases with a confirmed diagnosis of a fixed frontal position are indicated by absolute cesarean section (except for cases where the fetus is too small). When the frontal position is stuck in the pelvis, it is also very difficult to have a cesarean section and get the baby's head up, so it is necessary to monitor the labor process closely to avoid complications of the pregnancy stuck in the urinary tract. frame, uterine contractions, hypertonicity, large serous tumors, ... because sometimes mistakenly the position of the fetus has fallen, leading to uterine rupture, acute fetal distress and fetal death.
2. The fetus is in front of the fontanel
2.1 What is anterior fontanelle?
The fetus is in the anterior fontanel position, the head is slightly supine, the position is intermediate between the crown and forehead position. People also consider the anterior fontanelle as a type of forehead that is palpable first, the forehead is slightly bowed.
2.2 How to handle when the fetus is in front of the fontanel?
In many cases, the fetus needs to be delivered by cesarean section.
The treatment is similar to the frontal position:
If the progress is not favorable: The position does not fall or fall falsely, the membranes are broken, the uterus is threatened with cesarean section. . If the head is tilted more, it becomes a crest position, or if the head is tilted more, it can become a bottom line.
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