Why do babies prefer breech position?

Many pregnant women have found a problem, that is, when they find that the breech position is not correct, they correct it in time through the correct method, but when they check again after a period of time, they find that the breech position has changed again. This situation is very unfavorable for childbirth, because during normal delivery, only the head position can be performed first, so that other parts of the body can come out smoothly. So why do fetuses like breech position?

First, why does the fetus like the breech position? At about 8 months of pregnancy, there is not much room in the uterus, and most babies will take a head-down position to better utilize the limited space. This position is called cephalic position, or vertex presentation. At full-term birth, approximately 97% of babies are born in this position, with the majority of the rest being breech. There are several types of breech presentations: straight-leg breech (buttocks come out first with feet on top near the head), complete breech (buttocks come out first with legs crossed), or feet-first (one or both feet come out first). Usually the doctor will determine the fetal position by touching your lower abdomen to feel the position of the baby's head, back and buttocks. If the abdominal examination is not able to determine the fetal position, your doctor may perform an internal examination to

Second, the normal fetal position for normal delivery is cephalic presentation, that is, the fetus' head is facing down, but not all fetuses like this. Some fetuses have their buttocks down and their heads up, and some will sit upright in the uterus. When the fetus is in breech position, the buttocks or legs will come out first during delivery, followed by the body and finally the head, which can easily cause danger.

Why does the fetus prefer the breech position? Factors such as excessive amniotic fluid, loose abdominal wall of the parturient, and relatively more amniotic fluid in premature babies can all cause the fetus to move freely in the uterine cavity and form a breech position. If the pregnant woman has uterine malformations (such as unicornuate uterus, bicornuate uterus, etc.), fetal malformations (anencephaly, hydrocephalus, etc.), twin pregnancy, or too little amniotic fluid, the fetus's range of movement in the uterine cavity will be restricted, which can easily lead to breech presentation. In this way, the placenta is attached to the fundus and uterine cornu, with a breech presentation rate of 73% and a cephalic presentation rate of only 5%.