What abnormalities can be detected by ultrasound in late pregnancy?

For those friends who are about to have a B-ultrasound in the third trimester of pregnancy, it may be helpful to first understand the abnormal conditions that can be detected by the B-ultrasound in the third trimester of pregnancy! So what abnormalities can be detected by ultrasound in late pregnancy? Next, this article will introduce to you what abnormal conditions can be detected by B-ultrasound in the late pregnancy, for your reference only. Friends who want to learn more about the relevant knowledge may wish to take a look.

The late pregnancy refers to the period after the 28th week of pregnancy. During the 28-36th week of pregnancy, pregnant mothers should go to the hospital for prenatal check-ups every week. During the prenatal check-ups, the doctor will perform an ultrasound examination to understand the intrauterine development of the fetus.

What abnormalities can be detected by ultrasound in late pregnancy? The following are some of the abnormalities that may occur during late pregnancy examinations:

1. Abnormal placenta

The placenta is attached to the wall of the uterus and connected to the fetus through the umbilical cord. It is the only energy reservoir for material exchange between the fetus and the mother. The fetus can obtain the nutrients and oxygen necessary for development from the mother through the placenta, and excrete metabolic waste through the placenta.

The main abnormalities related to the placenta during pregnancy are placenta previa and placental abruption.

Placenta previa: Normally, the placenta should be attached to the front, back and side walls of the uterus. But in some cases, the placenta is attached to the top of the internal cervix like a small hat, just sitting on the head or buttocks of the fetus. This situation is called placenta previa.

Placental abruption: The placenta in a normal position is attached to the uterine wall before the fetus is born. If it gets upset during this period and tries to separate from the uterine wall, it is called placental abruption. Placental abruption and placenta previa are both major causes of bleeding in late pregnancy.

The incidence of abnormal placenta morphology, placenta accreta, placenta accreta, and placental white infarction was extremely low.

2. Abnormal fetal position

An abnormal fetal position means that before your baby is born, instead of being head-down in the head position (or "vertex presentation"), your baby lies sideways in your uterus (called "transverse birth") or in a breech position. There are several types of breech presentation:

Leg straight hip position (buttocks out first, feet on top close to the head)

Complete breech position (buttocks first and legs crossed)

Foot presentation (one or both feet come out first)

Most breech babies require a cesarean section. If your baby is still in the breech position at 37 weeks and you want to turn him, be sure to consult your doctor before taking any action.

3. Abnormal amniotic fluid

The normal amniotic fluid index in the late pregnancy is between 5 and 22 cm. If the total exceeds 22 cm, it is polyhydramnios, and if the total is less than 5 cm, it is oligohydramnios. However, the standards of different hospitals may vary slightly.

4. Umbilical cord around the neck

Umbilical cord around the neck is a relatively common phenomenon and may occur at any time during pregnancy. Sometimes, if the baby's umbilical cord is wrapped around the neck in the early stages of pregnancy, it will no longer be wrapped around the neck in the late stages of pregnancy. However, it is also normal for the fetus to still have the umbilical cord around the neck during delivery, which happens to about 1 in 4 babies.

According to a research statistic, the incidence of umbilical cord wrapped around the fetal neck in China is about 20% to 25%. The incidence of the umbilical cord around the neck for one week is 89%; the incidence of the umbilical cord around the neck for two weeks is 11%; the umbilical cord around the neck for more than 3 weeks or around the baby's trunk or limbs is relatively rare.

B-ultrasound examination can tell you whether the fetus has the umbilical cord around the neck, but ordinary black and white B-ultrasound is not as accurate as color Doppler B-ultrasound. But don't worry, most babies with the umbilical cord around the neck can be delivered naturally without any problems.

The above is an introduction to what abnormal conditions can be detected by B-ultrasound in the late pregnancy. I believe that after reading the above introduction, everyone has already understood the abnormal conditions that can be detected by B-ultrasound in the late pregnancy. From the above introduction, we can see that there are many abnormal conditions that can be detected by B-ultrasound in the late pregnancy, mainly four types of abnormal conditions. Therefore, every pregnant mother should understand these abnormal conditions when doing an ultrasound in the late pregnancy! This way, you'll have peace of mind.