When are the B-ultrasound examinations for pregnant women?

When you walk down the street or in the supermarket, you can see young pregnant women and expectant mothers everywhere. Pregnant women are concerned about the health of their babies, and most of them do so through B-ultrasound examinations. So when are the B-ultrasound examinations conducted for pregnant women? Let us now understand the days when ultrasound examinations are performed for pregnant women, so that we don’t have to worry if there are pregnant women at home.

The first B-ultrasound examination should be completed within 3 months

The best time to check is the 8th week. Its main functions are to determine the gestational age, whether it is an intrauterine pregnancy, and to check the thickness of the neck (only for four-dimensional color ultrasound). Research data show that during this period, by checking the thickness of the neck nt and combining it with Down syndrome screening, the detection rate of fetal congenital idiocy can be as high as over 80%.

The second ultrasound examination is at 20-26 weeks

This period is for fetal malformation screening, which is generally performed using three-dimensional or four-dimensional color ultrasound, and can detect most fetal malformations, such as those of the face, limbs, brain, internal organs, and heart.

The third ultrasound examination is at 30-32 weeks.

Its function is to supplement the examination of fetal fetal abnormality and fetal growth and development, and to check whether the fetus has growth restriction, the condition of amniotic fluid and umbilical cord, etc.

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

The functions are the same, both of which are to check the maturity of the placenta and the growth and development of the fetus, and do not involve fetal structure examination. During this period, if the umbilical cord is not wrapped around the neck, you can choose black and white B-ultrasound. If the umbilical cord is wrapped around the neck, the doctor will recommend the use of color ultrasound to perform umbilical artery blood flow examination.

The role of ultrasound examination during pregnancy:

(1) The purpose of B-ultrasound examination during pregnancy is to determine whether the fetal growth is consistent with the gestational age, whether the fetus has any malformations, and whether the fetus is safe in the uterus. In addition, the purpose of examination at different times is also different. The early B-ultrasound examination is to determine whether the pregnancy is present, the location of the pregnancy, and whether the size of the gestational sac is consistent with the time of amenorrhea, so as to provide a reliable basis for the estimation of the expected date of delivery and to promptly detect abnormalities in embryonic development; the purpose of the mid-pregnancy B-ultrasound examination is to observe whether there are any abnormalities in the development of various tissues and organs of the fetus, and to promptly detect fetal malformations, such as congenital heart disease, anencephaly, hydrocephalus, spina bifida, abdominal wall defect, short limbs, polycystic kidney, gastrointestinal atresia, etc.; the purpose of the late pregnancy B-ultrasound examination is to understand the safety of the fetus in the uterus and provide information for clinical treatment.

(2) The situation of B-ultrasound during pregnancy should be determined according to the pregnancy situation. Generally, a B-ultrasound examination should be performed in the early stages of pregnancy. An appointment can be made about one week after the menstrual period to confirm whether the woman is pregnant and determine the number of days of pregnancy. It can also determine whether there is an ectopic pregnancy. The second B-ultrasound examination is scheduled between 4th and 5th month of pregnancy. The purpose is to understand whether the fetal development is consistent with the gestational age, observe the morphology and structure of the fetal organs, and rule out fetal malformations. After the seventh month of pregnancy, regular B-ultrasound examinations should be performed to determine the safety of the fetus in the uterus.

The above article introduces in detail the days when pregnant women should undergo B-ultrasound examinations. I believe everyone understands it. Knowing the time for B-ultrasound examinations for pregnant women, you can do B-ultrasound examinations on time, so that you can determine whether the fetus has any deformities and understand whether the fetus is safe in the uterus. In addition, the purpose of examinations at different times is also different, providing a reliable basis for estimating the expected date of delivery.