Why is the fetus breech

summary

Breech position is one of the common abnormal fetal positions. Breech position before 30 weeks of gestation should not be regarded as abnormal; After 30 weeks, most of them could turn to head position naturally, and about 3-4% of them were in breech position continuously. Breech delivery is more dangerous to the fetus, prone to umbilical cord prolapse, fetal arm up, after the emergence of difficulties. It is easy to cause stillbirth, neonatal asphyxia, intracranial hemorrhage and birth injury when the breech position is not handled properly. The perinatal mortality is 3-8 times higher than that of occipital anterior position. The hip position takes the sacrum as the indicator point, and is divided into six positions: left anterior sacral, left transverse sacral, left posterior sacral, right anterior sacral, right transverse sacral and right posterior sacral. According to the types of presentation, it can be divided into single breech position (also known as leg straight breech position), complete breech position (also known as mixed breech position or compound breech presentation) and incomplete breech position. Why hip position? Let's talk about it

Why is the fetus breech

Fetal activity in the uterine cavity is too large, such as maternal abdominal wall relaxation, amniotic fluid or fetal small, so that the fetal activity in the uterine cavity is too free; Fetal movement in the uterine cavity is limited, such as abdominal wall tension in primipara. Twins, oligohydramnios and uterine malformations, etc., affect the fetal head can not turn down naturally;

Fetal head convergence is blocked, such as pelvic stenosis, cephalopelvic disproportion, placenta previa, soft birth canal obstruction and too short umbilical cord; Fetal malformations, such as hydrocephalus, anencephaly, etc., are not easy to join the fetal head into the basin. Most of these reasons can be found in time and handled properly through gynecological and B-ultrasound examination.

In all parts of the fetal body, the fetal head is the largest, the fetal shoulder is smaller than the fetal head, and the fetal buttock is the smallest. In cephalic delivery, once the largest fetal head is delivered, the shoulder and buttock smaller than the fetal head will be delivered smoothly without any difficulty. The situation of breech delivery is different. The smallest breech in the fetal body is delivered first, and the largest fetal head is delivered last. Therefore, it is often difficult to deliver the fetal head after the breech and shoulder are delivered. The fetal body has been delivered, the fetal head is still stuck in the vagina, and the fetal "lifeline" from the placenta to the fetal umbilical cord, the umbilical cord, is just squeezed between the fetal head and the vaginal wall. If the fetal head is not delivered within 5-6 minutes after the delivery of the fetal body, it may be due to the long time of umbilical blood flow obstruction and fetal hypoxia, resulting in severe hypoxia and death of the fetus. In the process of pulling out the fetal head, the brachial plexus may be injured by squeezing and pulling, or the excessive shaping of the fetal head may lead to excessive overlap and dislocation of the skull, which may lead to intracranial hemorrhage and other serious consequences.

matters needing attention

Before 28 weeks of gestation, you can do knee chest recumbent position exercises to correct, once a day in the morning and evening, each time for 10 minutes, continuous for 1 week, the fetal position can turn to normal. Its posture is, on the hard board bed, chest knee implantation, buttocks raised, thighs and bed vertical, chest should be as close as possible to the bed surface, but pay attention to loosen the belt before doing.