I don't know if the topic owner has done a big troubleshooting. If not, 28 weeks is the last chance. If you have a big row of abnormalities, 28 weeks is just a routine examination, and you won't check it in detail. 34 weeks is also a routine examination.

1, items to be checked for large row abnormality:

Fetal size, placental position, amniotic fluid volume, etc.

Head and neck, chest, abdomen, spine, limbs and other parts of the inspection.

Examination of the nose and lips of the fetus.

Can detect anencephaly, hydrocephalus, spina bifida, limb deformity, cleft lip and other problems.

2, 28 weeks, 34 weeks of routine inspection items

Fetal size (biparietal diameter, femur length, abdominal circumference), placenta (position, classification, thickness), amniotic fluid (amniotic fluid index, amniotic fluid depth), whether fetal position is normal, spinal arrangement, fetal heart rate, umbilical cord around the neck and fetal movement.

Can 28-week color Doppler ultrasound and 34-week color Doppler ultrasound only be tested?

I think it's better to test both.

1, whether the fetal position is positive:

Check the fetal position at 28 weeks. If it is not corrected in time, it will be difficult to correct it after 32 weeks. It will be more reassuring to confirm it in 34 weeks.

2. Umbilical cord around neck:

Umbilical cord around the neck is easy to cause fetal hypoxia. Every time you confirm the umbilical cord around the neck, you can know whether the fetus will be in danger and deal with it in time.

3, amniotic fluid situation

Amniotic fluid index is normal at 7-18cm, and the condition of amniotic fluid will change in different gestational weeks. The difference between 28 weeks and 34 weeks is 6 weeks, which may change greatly. Therefore, it is better to check it just in case, so as to make a reasonable judgment.

4. Fetal development

The indicators of fetal development are also a dynamic process. The development indicators are all within the standard range, so there is no need to intervene. If they are too big or too small, they must be adjusted through diet. The results will be known in 28 weeks, and they will be nursed back to health in the middle and confirmed in 34 weeks.

5. Placenta condition

In the third trimester, some pregnant mothers will have placenta previa. Knowing this situation in advance will help pregnant mothers improve.

In a word, every index of inspection is very important. It is necessary to know the results in 28 weeks, adjust them in 28 to 34 weeks, and confirm them in 34 weeks. Therefore, it is recommended to do both inspections.

That's my opinion. If you have any questions, please leave a message in the comment area for discussion.

Of course not, the fetus is developing at any time, so the pertinence of each examination is different. The 28-week color Doppler ultrasound and the 34-week color Doppler ultrasound examination are also different and cannot replace each other.

About 28 weeks of color Doppler ultrasound examination

This time, the color Doppler ultrasound can be checked in 22~28 weeks. Now the living standard has improved and the nutrition supply is sufficient. Therefore, doctors generally recommend that the examination be done in 22~26 weeks. At this time, the amniotic fluid is moderate and the whole picture of the fetus can be seen. When doing the examination, the limbs, face, heart, blood vessels and brain of the fetus will be examined in detail to rule out abnormalities such as cleft lip and palate, encephalocele and vascular malformation.

Note: You can go after eating enough, and you need to check the whole picture. Bad fetal movement will affect the inspection speed. Some may need to climb stairs and other items to stimulate fetal movement. It may take 2~3 times for a pregnant mother to complete the examination.

About 34 weeks of color Doppler ultrasound examination

This time, the color Doppler ultrasound can be checked in 30~34 weeks, mainly to supplement the abnormality check, to know the size of the fetus, whether there is umbilical cord around the neck, the position of placenta, the fetal position, and the amount of amniotic fluid.

Precautions: the fetus develops rapidly in the third trimester. At this time, the examination mainly depends on whether the fetus has developmental restriction, turbid amniotic fluid, more or less amniotic fluid, abnormal fetal position and placental support.

In a word, the time and project of the two inspections are different, so we can't just check once. The more you reach the third trimester, the more you should pay attention to each examination to ensure full-term delivery.

According to your topic, it is described that 28-week color Doppler ultrasound and 34-week color Doppler ultrasound should be big-row abnormality and small-row abnormality respectively. The inspection items and purposes of the two are completely different. Let's make a brief introduction to big row deformity and small row deformity respectively.

Big row of abnormalities.

Large ovulation usually takes place in 20 to 28 weeks. Large-scale deformity can be detected by three-dimensional or four-dimensional B-ultrasound. It is a very important test during pregnancy, and the requirements for doctors are relatively high. Therefore, it is necessary to make an appointment in advance for the B-ultrasound of large-scale malformation, and only professional doctors can operate it.

Large ovulation is the most detailed examination of the fetus during pregnancy. It mainly includes the following inspections

Whether the fetus's face is deformed.

Check the development of fetal digestive system.

Check the development of fetal urinary system.

Check the development of fetal nervous system.

Also check the kidney, heart, limbs, fetal size, mother's amniotic fluid condition and so on.

It takes a long time to check the abnormality, usually about an hour.

Small row deformity

Small row deformity is generally carried out around 34 weeks of pregnancy. Another purpose of small row malformation is to estimate the weight of the fetus. Comprehensive other conditions to evaluate whether pregnant women have the conditions for natural delivery.

In addition, because the fetus has grown up a little, some abnormalities only appear in the third trimester of pregnancy, so it is very necessary to do small ovulation. Small platoon abnormality mainly checks the position of the fetus, the position of the placenta, the development of the placenta, the appearance of the fetus, the amount of amniotic fluid, whether the umbilical cord is around the neck and so on.

Therefore, whether it is large or small, pregnant women should be examined.

First of all, pregnant women should clearly know that the focus of each prenatal examination 30 weeks ago is different. Even if it seems that all the prenatal examinations are for color ultrasound, it is impossible to say which prenatal examination can replace which one, and every prenatal examination in the third trimester is equally irreplaceable, so you can't just do one of them.

The 28-week-old color Doppler ultrasound is what we often talk about. We should screen the obvious abnormalities of the fetal body surface, such as the fetal skull, ventricle, spine, facial features, liver, gastric vesicle, kidney, bladder, umbilical cord, ulna, radius, tibia, and fetal limbs, excluding the fingers, and see if there are any defects. This time, we must do the large-scale abnormality and do it before 28 weeks.

According to the development of the fetus, it was born at the 28th week, and it was already a small life. Even with the medical technology a few years ago, the chances of the baby's survival were very high. If it was found that it was anencephaly and the fetal heart was defective at this time, it would involve ethical issues.

The 34-week-old color Doppler ultrasound, which we call small ovulation, is generally to understand the fetal biparietal diameter, abdominal circumference, femur length, humerus, fetal position, fetal weight, fetal heart rate, umbilical blood flow, fetal umbilical cord around the neck, amniotic fluid depth, amniotic fluid index and placental maturity.

According to the huge group of pregnant mothers I came into contact with, at this stage, the common situations are: umbilical cord around the neck, less or more amniotic fluid, low fetal weight, and the fetal head does not conform to the current number of weeks of pregnancy. No matter which of these situations occurs, if it is not paid attention to, it will still cause premature birth, and the severe one will still cause fetal death in the palace. Therefore, I hope that pregnant parents and mothers will not take chances for laziness or saving money.

Can 28-week color Doppler ultrasound and 34-week color Doppler ultrasound measure only one thing?

Of course not, the fetus is a process of continuous development, and the examination is different every certain number of weeks, so the prenatal examination should be carried out in strict accordance with the doctor's advice.

28-week color Doppler ultrasound

It belongs to the second abnormality check, focusing on whether the fetus is deformed and whether the cerebellum, nose and lips, spine and heart are developing normally. The nose and lips mainly focus on whether the fetus has cleft lip and palate, whether the nasal bone is normal, whether the spine is bent and broken, whether the heart valve is defective and whether the development is normal. This is a very important check stage, and pregnant mothers must not miss it.

34 weeks color Doppler ultrasound

It is also an important period to check the fetus. At this time, it is enough to do ordinary color Doppler ultrasound, focusing on measuring the fetal size, placental maturity and amniotic fluid volume, monitoring the growth and development speed of the fetus to see if the fetal development is normal.

In the third trimester, the frequency of color Doppler ultrasound should be more frequent, because the fetus is getting bigger and bigger. It is necessary to check the development regularly to see if the fetus is normal, and check the fetal heart rate regularly to see if the fetus is short of oxygen and whether the energy of the mother can be absorbed.

This is to regularly observe the growth and development of the fetus. Of course, you can do it if you don't want to, once or twice, because the baby is your own and has nothing to do with others. From the doctor's point of view, it's just to make the baby born healthier.

Women are generous in buying clothes, eating and cosmetics, so why are they so entangled in spending three or five hundred inspection fees on their babies? Do people who see a doctor want the doctor not to prescribe medicine without examination, and just say that it's okay to go home and wait?