Ultrasound B during pregnancy
How many ultrasound tests should I have during pregnancy?
Recently, many expectant mothers have consulted B ultrasound examinations during pregnancy. Expectant mothers are very entangled: doing more is afraid of not being good for the fetus, and doing less is afraid of missing any important examinations. How many ultrasound tests should I have during pregnancy? Today, I will take you to learn more about the relevant knowledge of B ultrasound examination during pregnancy.
How much is known about ultrasound examination during pregnancy
Ultrasound examination during pregnancy is an important part of the obstetric examination project, which can be divided into "fetal structural abnormality screening" and "routine ultrasound examination".
One
Ultrasound screening for fetal structural abnormalities
According to experts from the Department of Ultrasound of Tianjin Aiwei Hospital, the three important time periods for prenatal ultrasound examination in our hospital are 12+2-13+6 weeks of pregnancy, 23-24 weeks of pregnancy, and 26-28 weeks of pregnancy. These three time periods are mainly for screening for fetal structural abnormalities, which is commonly referred to as dentistry examination. The highlights of these three ultrasounds are:
Pregnancy 12 + 2 - 13 + 6 weeks
The thickness of the transparent layer (NT) at the back of the neck of the fetus is examined, and the purpose of the examination is to assess the risk of abnormal fetal chromosomal .
23-24 weeks' gestation
Screening is mainly for six categories of severe structural malformations, including anencephaly, severe ecseyle, severe open spina bifida, severe chest and abdominal wall defects visceral valgus, single-cavity heart, and fatal cartilage dysplasia.
26-28 weeks' gestation
It is mainly used for screening for late-onset malformations, such as hydrocephalus, microcephaly, and intracranial mass lesions.
Two
Routine ultrasonography
In addition to the above three orthora screenings, there are also ordinary ultrasound examinations during pregnancy to observe the development of the fetus, and the number of specific tests depends on the specific conditions of the pregnant woman and the fetus.
Early pregnancy
1. In the early pregnancy period, it is necessary to do B ultrasound to determine intrauterine pregnancy and gestational age to exclude the possibility of ectopic pregnancy, and for women with irregular menstruation, they should check the gestational age through B ultrasound.
2. If it is a twin, chorionicity should be determined.
Middle and late pregnancy
1. Ultrasonography to understand fetal growth, amniotic volume, fetal position, placenta, and be vigilant about fetal growth restrictions.
2. Ultrasonic measurement of cervical length (suitable for high-risk premature birth).
3. Third trimester of pregnancy: ultrasonography to assess fetal size, amniotic fluid, placental maturity, fetal position and umbilical cord blood flow.
Three
Recommendations on ultrasonography
In summary, the number of ultrasound examinations during pregnancy cannot be generalized, and the purpose of examination should be the mainstay. In addition, we should also remind everyone that B ultrasound is the most commonly used, non-invasive and repeatable method to understand the general morphology of the main anatomy of the embryo and fetus, but due to the limitations of ultrasound technology, prenatal ultrasound cannot find all malformations, nor can it predict the future development of the fetus.
There are many other, equally important tests that cannot be ignored in prenatal care for the purpose of pregnancy care, and the same ultrasound diagnosis cannot be equated with a clinical diagnosis. When ultrasound B finds abnormalities, it should be treated and treated accordingly under the advice of an obstetrician.