How many weeks is the best time to do a major fetal malformation screening?

To put it simply, B-ultrasound for fetal abnormality screening is a gynecological physical examination method, which can also screen for minor fetal abnormalities. Generally speaking, the timing of B-ultrasound for fetal abnormality screening is worthy of our attention. So, how many weeks is best to do ultrasound to screen for fetal abnormalities? Next, I will explain these aspects in detail for everyone, hoping to be of some help to everyone.

Generally, the examination can be carried out when the pregnant woman is around 18-28 weeks of pregnancy. Four-dimensional color ultrasound can display the color, face, and internal organs of the fetus in three dimensions, and even the condition of the fetus in the pregnant mother can be observed; malformations of the fetus, such as cleft lip and palate, cleft palate, abnormal bone development, cardiovascular malformations, etc. can be diagnosed at an early stage. Grasp the dynamic process of fetal movement in the uterine cavity, and then dynamically record the fetal movement in the uterine cavity as a permanent souvenir.

Generally, Down syndrome screening is done around 17 weeks to check for neural tube defects in the fetus. Alternatively, a 3D B-ultrasound can be done between 24 and 26 weeks to visually see the growth and development of the fetus, including whether the fetus has cleft lip and palate, and the development of internal organs.

It is best to have a color Doppler ultrasound examination between 18 and 20 weeks of pregnancy. During this period, each organ of the fetus has been fully developed. Careful B-ultrasound examination can show whether there is any abnormality in each important organ. The deformed fetus can be detected early and the pregnancy can be terminated immediately, with less impact on the mother's body. After that, if there are no abnormalities, you can do another B-ultrasound examination until the last few weeks of pregnancy to estimate the size of the fetus, understand the location of the embryo and the amount of amniotic fluid flow.

During pregnancy, you should have regular prenatal checkups and closely observe the growth and development of the fetus. Ultrasound examination is necessary, and generally significant physical abnormalities or deformities can be confirmed, but it is not certain. It is recommended to follow the advice of the clinician according to your own situation.

The above is some information that the editor has introduced to everyone about the best weeks to do B-ultrasound for fetal abnormality screening. I hope it will be of some help to everyone. Generally speaking, it is better to do an ultrasound to screen for fetal abnormalities in the second trimester of pregnancy, because the fetal position is relatively stable at this time, the fetus is basically formed, and the actual result of the examination is relatively accurate. Expectant mothers should also go out for a walk more often, which is beneficial for the birth of the child.