All strategies for B -ultrasound during pregnancy!Check the matters and precautions here

Preparatory examination is a compulsory course for mothers during each pregnancy.The complete and standardized prenatal examination can significantly improve the quality of the newborn and the pre -post -post -post -maternal pre -post -post -post -post -post -maternity.

Ultrasonic examination is an important part of the checkup.As the gestational week increases, the content of ultrasound detection is constantly changing.So, when should I do a B -ultrasound?What do you need to pay attention to every time you check?Today, let’s popularize the common sense about ultrasound during pregnancy.

6 ~ 8 weeks of pregnancy: diagnosis of pregnancy

In the early pregnancy, it was not enough to perform only blood HCG testing or urine pregnancy test.Because these cannot help us exclude embryonic dysplasia or ectopic pregnancy.Therefore, at 6 to 8 weeks of pregnancy, we need to perform the first B -ultrasound to diagnose pregnancy and exclude ectopic pregnancy.

The B -ultrasound examination during early pregnancy has the following goals:

Clearly understand the location of the pregnancy sac, and it is clear whether it is internal pregnancy or anotonic pregnancy (commonly known as ectopic pregnancy).

A verification of gestational weeks and judging embryo development.According to the diameter of the pregnancy sac, the size of the fetal buds, and the length of the fetal head and hip length, the pregnancy age can be judged; the normal fetus can hear the fetal heart beating during this period. If not, it is prompted that the embryonic may stop the development, and it should be reviewed regularly.

Judging the number of embryos, this is the most accurate method of diagnosis of multi -fetal pregnancy.

In the early days, the uterus and appetite were abnormal.The uterus is the baby’s home in the next October. If the family is not good, the fetus will not be good.Therefore, it is necessary to check the uterus and attachments early.

During this period, expectant mothers can see the round pregnancy sac under the ultrasound probe and the tiny fetal heart beating.Is this the first "intimate contact" of the mother and the fetus, is it amazing?

Note: Clinically, the B -ultrasound during the early pregnancy is ultrasound. Before the examination, the prospective mothers need to drink more water and fill the bladder to form a good sound -transparent window.

11 weeks of pregnancy to 13+6 weeks: After the early Tang screening is diagnosed, expectant mothers are often excited and nervous.Is there any abnormal baby in the baby?Will it be deformed?So we ushered in the second ultrasonic examination during pregnancy.

There is a special task for this inspection that requires us to screen "Tang’s".Normal fetal neck transparent layer (NT) represents the amount of liquid deposits produced by fetal physiological metabolism.Its thickening is related to 21 triterlages, Terri syndrome and other chromosomal abnormalities, as well as a variety of malformation and genetic syndrome.If the baby is NT> 3cm, it is highly likely that the fetal abnormal possibility of chromosomes in the fetus is very high, and we need to deal with it in time.

Note: The NT value also needs to be measured in conjunction with the fetal location.Clinically, common babies have been facing the ultrasonic probe with their butt, and they refuse to turn around, so that the NT value cannot be measured accurately.At this time, the prospective mothers need to cooperate with or try to measure the day.If there is no satisfactory result, it can also be screened by the mother’s blood. The combination of the two can eliminate the risk of the fetus suffering from the Tang family syndrome.

18-24 weeks of pregnancy: After the early birth checkup, the mothers in the middle of pregnancy ushered in another big test, that is, "big abnormal screening".This examination aims to systematically screen the fetus whether the fetus has structural malformations.

The inspection items mainly include the following aspects:

Number of fetus

Fetal position

Fetal heart rate

Fetal biological measurement

Fetal anatomy structure: head, face, neck, chest, heart, heart, abdomen, spine, long bones

Fetal attached: placenta, umbilical cord, amniotic fluid amount

Pregnant women’s uterus: The inner mouth of the cervix, whether there are uterine fibroids, etc.


1. Appointment in advance: Since the large row of abnormal examination is a comprehensive examination of the fetal systems, the duration is related to the fetal position, the individualization of pregnant women, and the instrument and equipment, so it takes a long time.It is recommended that prospective mothers make an appointment for the hospital in advance for prenatal deformity screening.

2, no empty stomach: "large row defaults" for a long check time, so there is no need to empty the stomach.On the contrary, if the mother eats full, the baby is full of energy, and may continue to change the position in the mother’s body, which is conducive to the doctor’s angle that can check the fetus in all directions.

3. Some subtle deformities: such as facial details, fingers, toes, etc. may not be completely screened.Therefore, it cannot be considered that the babies have been lost, and the baby is still lost at that time.

Thirty -32 weeks of pregnancy, the baby grows up for 28 weeks, has the ability to survive.Even at this time for some special reasons, the baby will have a higher chance of surviving after active rescue and care.

Between 30 and 32 weeks, we have to evaluate the first B -ultrasound of the first babies in the third trimester of pregnancy.In addition to observing whether the growth and development of the fetus conform to the gestational week, pay attention to whether the placenta and amniotic fluid in the mother’s body should be satisfactory; whether the S/D ratio of the umbilical cord blood flow is normal, and whether the umbilical cord blood flow supply of the fetus is sufficient.

If the fetus is abnormal at this time, we need to actively find the cause and do urgent treatment.

37 ~ 40 weeks of pregnancy evaluate the fetal condition

37 weeks are an important watershed during pregnancy.Babies who have across 37 weeks have already had the basic conditions of coming to this world, and we are ready to be familiar with melon. We call it full moon.

During this period, the growth rate of the baby has become slow, the range of activity in the uterus has been limited, and the fetal position has gradually stabilized.At this time, the purpose of the B -ultrasound examination is to determine the size of the fetus and provide a reference for the choice of childbirth. At the same time, it is also necessary to evaluate the maturity of the placenta and the amount of amniotic fluid to determine whether the fetus has signs of hypoxia.

Of course, the above is the most ideal state of B -ultrasound during pregnancy.According to the different situations of pregnant women, for example, pregnant women suffer from basic diseases before pregnancy; or when complications occur during pregnancy, doctors will increase the number of B -ultrasound examination as appropriate to strictly monitor the baby’s safety in the palace.At this time, expectant mothers should be more patient, let us welcome the birth of healthy babies together.

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