Why do pregnant women absolutely have to go for an ultrasound in the first trimester?

Ultrasound in the first trimester in particular and the entire pregnancy in general is a tool to help obstetricians monitor pregnancy. Ultrasound can be performed at different times to assess the development of the baby in the womb.

Video content consulted by Specialist Doctor I Truong Thi Phuong - Diagnostic Imaging Department - Vinmec Ha Long International Hospital

Along with the advancement of science and technology, 4 weeks pregnant ultrasound or any time of pregnancy has become very popular and increasingly reflects the internal structure with 2D, 3D and 3D images. 4D.
During pregnancy there are many important milestones for antenatal check-ups, however, there are 2 landmarks that pregnant women need to remember and perform a pregnancy ultrasound in the first 3 months:
Time of missed period; Week 5 or week 8 should be checked to accurately assess the position of the fetus as well as the embryo and fetal heart. Depending on the condition of the pregnant woman, if the first abdominal ultrasound clearly shows the gestational age and embryo, there is no need to check through the transvaginal probe. In the case of 4-week pregnancy ultrasound that shows the fetus implanting in the wrong position, it is necessary to clearly determine whether there is an embryo or no embryo, with a heart or without a heart for further examination by vaginal.
When the first 3 months of pregnancy ultrasound, in addition to the 5-8 week ultrasound mark or based on the 6-week-old ultrasound image to determine the implantation position of the fetus as well as the embryo, the fetal heart, the pregnant mother needs to pay attention. to another important milestone is 11-13 weeks 6 days to be able to assess the most accurate gestational age, assess the baby's development in the whole pregnancy later.
Previously, when having an ultrasound in the first 3 months and the entire pregnancy, the doctor would only measure the length of the head and buttocks to assess the gestational age, then measure the nuchal translucency to do double test screening, then Nowadays, fetal medicine is developing more and more, recommending gestational age from 11 to 13 weeks and 6 days, to screen for major abnormalities of the baby such as anencephaly, single ventricle, fetal abnormalities. Abnormalities such as umbilical hernia, diaphragmatic hernia, spinal fissure, no arms and legs. The early detection of abnormalities is of great significance because if detected late, the termination of pregnancy is very difficult, affecting the mother's psychology.
First trimester ultrasound can help identify signs related to chromosomal abnormalities for a screening strategy. Bilateral uterine artery ultrasound combined with clinical and blood test parameters to assess the risk of preeclampsia. This issue is very important because preeclampsia is a serious condition that can affect the life of both mother and fetus.
Of all the antenatal check-up milestones, the first 3 months of pregnancy ultrasound is an extremely important milestone to accurately determine the baby's gestational age and best control related malformations, so mothers need to try their best. Go to the doctor on time, have an ultrasound in the first 3 months of pregnancy for the best screening for your baby.