What is the significance of screening for fetal abnormalities at 32 weeks of pregnancy?

We can find that the number of newborns with malformations is getting lower and lower. This is because medical technology is becoming more and more advanced. Many people will conduct regular fetal anomaly screening when they are pregnant, so that they can be eliminated and screened. So what kind of fetal anomaly screening should be done at 32 weeks of pregnancy? How many times should fetal anomaly screening be done during the entire pregnancy?

What are the tests for late pregnancy fetal anomaly screening at 32 weeks?

The purpose of doing a fetal fetal malformation screening in the late pregnancy at 32 weeks is to supplement the fetal fetal malformation screening and the examination of the fetal development status, to check whether the fetus has growth and development restrictions, the condition of the pregnant woman's amniotic fluid and the fetal umbilical cord, etc.

How many times should fetal anomaly screening be performed during pregnancy?

1. The first B-ultrasound examination should be performed within 3 months

The best time to check is the 8th week. The main functions are to determine the gestational age, whether it is intrauterine pregnancy, and to check the cervical NT thickness (only for 4D color Doppler ultrasound). Scientific research data show that at this stage, by checking the thickness of the neck NT and combining it with Down syndrome screening, the diagnosis rate of congenital idiocy in the fetus can reach more than 80%.

2. The second B-ultrasound examination time is 20-26 weeks

This stage is the fetal malformation screening, which is usually carried out using three-dimensional or four-dimensional color ultrasound. It can detect most of the malformations of the fetus, such as facial, limbs, brain, internal organs, and heart malformations.

3. The third B-ultrasound examination time is 30-32 weeks

The function is to supplement the examination of fetal abnormalities and fetal development status, to check whether the fetus has growth and development restrictions, the condition of the pregnant woman's amniotic fluid and the fetal umbilical cord, etc.

4. The fourth and fifth B-ultrasound examinations were conducted at the 37th and 39th weeks of pregnancy respectively.

The functions are the same, which is to check the maturity of the placenta and the development of the fetus, and does not involve the examination of fetal structure. At this stage, if the fetal umbilical cord is not wrapped around the neck, you can choose black and white B-ultrasound. If the fetal umbilical cord is wrapped around the neck, the doctor will recommend using B-ultrasound to check the umbilical artery blood flow.

For older pregnant women over 35 years old, the chance of sex chromosome nondisjunction during meiosis of their eggs is higher than that of normal pregnant women, and it is very easy to have abnormal number of sex chromosomes after fertilization.

Pregnant women who have given birth to chromosomal abnormalities before have a 1/60 chance of giving birth to such patients again, which is 10 times higher than that of normal pregnant women. It is possible that one of the spouses has an undetected chromosomal abnormality or that the standards for chromosomal abnormalities that occurred previously are still not met.

If one of the spouses has a chromosomal abnormality, they are more likely to have a baby with a chromosomal abnormality.

Now everyone can clearly know what the main purpose of the 32-week late pregnancy fetal fetal screening test is to check. In fact, the test at this time is to clarify the previous test. At the same time, it is also necessary to regularly carry out several fetal fetal screenings during pregnancy. This can significantly reduce the birth of deformed babies and avoid long-term tragedies for some families.