Causes of fetal descent

The fetal position is also a very important part of the pregnancy. Only when the fetal position is very proper will it be more convenient for the pregnant woman to give birth later and the development of the fetus will not be affected. Many pregnant women feel very uncomfortable in their stomachs because of the displacement of the fetal position. If the umbilical cord is wrapped around the neck during delivery, only a caesarean section can be performed. So what is the reason for the downward displacement of the fetal position?

Pregnant women should not sleep on their backs.

Pregnant women usually have a bulging abdomen in the middle and late stages of pregnancy. They are afraid of crushing the fetus when sleeping on their side in bed, which is also very uncomfortable. Therefore, some people sleep in a supine position. In fact, this is not a very good sleeping position.

After a woman becomes pregnant, her uterus increases from about 40 grams before pregnancy to about 1200 grams in the late pregnancy. Combined with the weight of the amniotic fluid and the fetus, it can reach more than 6000 grams. Blood flow to the uterus also increases accordingly. If you sleep on your back often, the abdominal aorta behind the uterus will be compressed, which will affect the blood supply to the uterus and the nutrition supply to the fetus. At the same time, lying on your back may slow down the blood flow to the kidneys and reduce urine volume. The sodium salt and toxic substances produced by metabolism in the pregnant woman's body cannot be excreted in time, which can cause pregnancy poisoning and gradually worsen, leading to high blood pressure, proteinuria, and edema of the lower limbs and vulva.

In addition, when pregnant women sleep on their backs, it can compress the inferior vena cava behind the uterus, reducing the blood returning to the heart, leading to insufficient blood and oxygen supply to the brain. Pregnant women will experience symptoms such as dizziness, chest tightness, pale complexion, nausea and vomiting. In severe cases, blood pressure will drop day by day, causing supine hypotension syndrome.

Sleeping on your back can also easily induce early placental detachment in the late pregnancy, causing the pregnant woman to suddenly experience abdominal pain, vaginal and uterine bleeding, and the fetus may die in the uterus due to ischemia. In the middle and late stages of pregnancy, if pregnant women often lie in a supine position, they are prone to diseases such as pyelonephritis.

Therefore, pregnant women should not sleep in a supine position.

It is best to rest on the left side, because this is conducive to the absorption of nutrients by the fetus. But you can also change your position appropriately.