Within a certain range, it is normal for expectant mothers to have a pregnancy test if there is a difference between the pregnancy test and the actual pregnancy test. The size of pregnancy test is estimated by B-ultrasound, uterine height and abdominal circumference, so there will be some errors in many cases. In general, this error is normal within two weeks. In other words, it is normal that the gestational age of pregnancy test is two weeks larger or smaller than the actually calculated gestational age, so expectant mothers need not worry too much.
These factors will affect the gestational age. General doctors will estimate the gestational age by measuring the height of uterus or abdominal circumference through B-ultrasound. Theoretically, as long as it is a measured value, the error is allowed, and there are many factors that affect the measurement accuracy:
The accuracy of doctors' measurement techniques/instruments
Different doctors have different pregnancy tests on the same pregnant woman, so the measurement results will be different because of the different detection techniques and instrument accuracy, which may lead to the inconsistency between the pregnancy test and the actual calculated gestational age;
Degree of fetal cooperation
Doctors get the gestational age value, usually by detecting fetal head circumference, femur length and other data, and then get the gestational age result through a series of calculations. If the fetus is in different positions or shows different actions during the examination, it will affect the doctor's measurement results and lead to errors between the measurement results and the calculation results.
Physiological cycle of pregnant women
Under normal circumstances, women's physiological cycle is 28-30 days, but some women's physiological cycle is less than 28 days or more than 30 days, and the actual pregnancy time is longer or shorter than the calculated time.
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Some doctors mainly use B-ultrasound to detect fetal femur length or head circumference. If the baby's parents are tall, then he may be older than the baby of the same age, and the gestational age will be greater than the gestational age, and vice versa.
Nutrition during pregnancy
The growth of the fetus needs to absorb nutrition from the mother. If the expectant mother can't keep up with the nutrition during pregnancy and has symptoms such as calcium deficiency and anemia, it may lead to fetal growth retardation and small gestational age. On the contrary, expectant mothers have better nutrition during pregnancy, and the fetus may be larger than the normal baby, and it is estimated that the gestational age will be larger.
Living habits during pregnancy
Even if some expectant mothers are pregnant, they still maintain bad living habits, such as staying up late, smoking and drinking. These behaviors will affect the health of expectant mothers, and then affect the growth and development of the fetus, which is prone to the situation that the gestational age of the fetus is too small.
Fetal dysplasia
For some reasons, fetal growth retardation can also lead to too small gestational age. In this case, expectant mothers should take corresponding measures according to the guidance of doctors.
Generally speaking, expectant mothers don't need to worry too much as long as the difference between the gestational age of pregnancy test and the actually calculated gestational age is within two weeks. If the pregnancy test is done on time and the baby is normal, there will be no big problem.
Many treasure mothers find one problem after another when they go for a prenatal examination. Their birth check-up report is inconsistent with the gestational age. Many pregnant mothers are particularly anxious, but there is no mention of the baby's birth check-up. How is this?
First of all, the fetal size examined by B-ultrasound is inferred by the following indicators. The first is the baby's biparietal diameter, which is the diameter of the baby's head, which is the diameter of the study circle in the school. The biparietal diameter is not only an indicator of natural delivery, but also a signal light for the normal development of the baby.
The pregnant mother's abdominal circumference is also a way to speculate on fetal changes. If the fetus gets bigger, the pregnant mother's abdominal circumference will also change relatively. In the third trimester, it is normal for the pregnant mother's abdominal circumference to increase by 0.85 cm per week, but it is not that the abdominal circumference has increased, or the fetus has become bigger, because some pregnant mothers still have long meat and no fetus, so the change of abdominal circumference does not mean that the fetus is developing well.
The length of fetal femur refers to the length of fetal femur, which is the largest long bone in human body. We can infer the height of the fetus from the length of the femur, so as to understand the development process of the fetus.
B-ultrasound is also an estimation method, which is not directly weighed by scales, but some experienced doctors can guess the size of the fetus by touching.
There are different reasons for fetal development size and gestational age in prenatal examination. First, pregnant mothers have menstrual disorders.
If the last menstruation of pregnant mother before pregnancy is advanced and postponed, it will affect the time of ovulation, and the ovulation period will be disordered, which will directly affect the time of fertilization, so the gestational age will not match, so there will be some error in the expected date of delivery, and the menstruation will be one week earlier. Then the expected date of delivery may be one week earlier, and menstruation may be delayed by one week, so the expected date of delivery may be delayed by one week.
Second, it is difficult to implant.
After the fertilized egg is ready, find a place to implant it. If there is something wrong with the fallopian tube, it will definitely lead to the implantation of fertilized eggs in the fallopian tube, which is ectopic pregnancy. If the uterine environment is poor, it will make it more difficult for fertilized eggs to implant, and the delayed implantation time will also have a certain error with the gestational age.
Third, the blood sugar level in the blood.
The blood sugar concentration of pregnant mothers during pregnancy will directly affect the development of the fetus. What needs to be clear is that pregnant mothers with gestational diabetes will directly affect the development of the fetus, and gestational diabetes will secrete more amniotic fluid, causing excessive intrauterine pressure, directly affecting the normal development of the fetus, and premature rupture of membranes may occur.
Fourth, the function of umbilical artery.
Umbilical cord plays a key role in placental transport. Nutrition and oxygen are delivered to the fetus through the umbilical cord. If the umbilical cord is knotted, or there is water sac phenomenon, then the fetus will not get normal oxygen and nutrition, which will definitely affect the development of the fetus. It is normal for the fetus to be too small.
Fifth, placental function.
Placenta plays a role in pregnant mother's body. Just like gas stations and transit stations, the nutrition and oxygen of pregnant mothers reach the placenta, and then the placenta belt is responsible for transporting them to the fetus. Placental function decline and placental aging are problems encountered by many pregnant mothers. However, after the function declines, the ability to deliver oxygen and nutrition declines, which will affect the normal development of the baby.
Fifth, how many people were born?
If there are two or more fetuses in the mother's belly, then the nutrition consumed by the pregnant mother is completely insufficient for the normal absorption of the fetuses, so it is normal that the weight and size of the fetuses will be different. After all, a person's intake is limited, and the weight and height of twin fetuses will be different from those of normal fetuses.
Sixth, the mother is anemic.
If the pregnant mother is anemic, it means that the pregnant mother has less iron, and the lack of iron means that hemoglobin is reduced, because iron is mainly hemoglobin. When hemoglobin has less oxygen to transport blood, its ability to transport oxygen will decrease, and the oxygen in blood will be insufficient, and various functions of the body will be affected.
As long as we do every prenatal examination well, we can see the truth behind a lot of data from our prenatal examination report. If there is no prenatal examination, then we can't understand the fetus in amniotic fluid.
Prenatal examination is not everything, it is just an auxiliary tool. Through this examination, we can infer some information about the fetus, but this is only a screening process and cannot be said to be a means of diagnostic examination. So many people have this misunderstanding. As long as there is no problem with prenatal examination, there must be no problem with the birth of the fetus. Pregnant mothers must correctly treat the orientation of prenatal examination.
This is the embarrassment that Enron's mother experienced personally:
The doctor's judgment is inconsistent with the number of weeks of pregnancy shown by B-ultrasound. Of course, the hospital doctor miscalculated. Because the number of weeks of pregnancy does not match, Enron's mother still remembers that the doctor said that if the baby had not started at the end of the month, it would be a caesarean section. In fact, at this time, Enron's mother's intrauterine baby is not full-term. If it is a caesarean section, it is a "premature baby". Of course, the result is good. Enron's mother was not misdiagnosed.
The cause of this incident is also very simple, because the doctors in the hospital where Enron's mother went to see a doctor rotate, which means that Enron's mother has a pregnancy test this week and will go back next week. It may not be this doctor. On the way, Enron's mother was miscalculated by the second doctor, and of course it was corrected later, because according to the calculation of the second doctor, 42 weeks have passed by the end of the month, and if it is not cut, the baby's life will be in danger.
Of course, it is not that there are not enough professional doctors in the Second Medical College, but that B-ultrasound sometimes causes doctors to miscalculate the date of the last menstruation, thus leading to the advance or delay of the final expected date of delivery. This also caused Enron's father to stay up all night for half a month, always chanting "Why don't you start?"
Does prenatal examination find that the fetal development size does not match the number of weeks of pregnancy? What happened? The difference between the actual pregnancy weeks and the pregnancy test results may be caused by the calculation error of the last physiological period. Of course, you just need to find the B-ultrasound list made by the pregnant mother for the first time and recalculate it. Pregnant mothers don't have to worry too much
Calculation method of estimated delivery date:
About the calculation method of expected date of delivery, Enron's mother has made detailed popularization in some previous articles. If pregnant mothers want to know more, they can look at the questions and answers before Enron. Here, Enron's mother only gives a simple example, and pregnant mothers can calculate according to their actual situation.
Summary:
It is a common phenomenon that the number of gestational weeks differs from the actual gestational weeks of pregnant mothers. Once this happens to pregnant mothers, don't worry too much. This doesn't mean that there is anything unusual about the baby. After this happens, the doctor will compare the B-ultrasound list of pregnant mothers with the data of pregnant mothers at this stage, and reconfirm that the probability of misdiagnosis is very small, and pregnant mothers can follow the doctor's guidance.
Text Ⅰ The Parenting Classics of Enron's Mother
Figure 1 is from the source network.
Does prenatal examination find that the fetal development size does not match the number of weeks of pregnancy? What happened?
This is a very common phenomenon. Many pregnant women will encounter such a situation during prenatal examination. They are always worried that there will be problems in the development of the fetus. Actually, it's not. This is a normal phenomenon. Pregnant mothers should not be too nervous and worried.
What is the reason for the discrepancy between fetal size and gestational age? When doing color Doppler ultrasound, the doctor will ask when the last menstruation is, so as to compare whether the development of the fetus is consistent with the gestational age, but many pregnant mothers can't remember the specific day, which leads to errors.
2. Measurement error
The gestational age of color Doppler ultrasound is based on the values of biparietal diameter, head circumference, abdominal circumference, humerus and femur measured by doctors, so there is a certain error.
3. Machine error
Because the machines in each hospital are different, there is a certain error between the machines, but not too much difference.
4. Fetal posture relationship
Because the posture of the fetus is not static, it is constantly changing and moving, and several postures may be changed during the inspection, so some measurement errors will occur because of the occlusion of the fetus.
5. Fetal dysplasia
If the difference is too big, of course, it does not rule out the situation of fetal growth retardation. During pregnancy, you must check the growth and development speed of the fetus on time, and if you feel abnormal, you should go to the hospital immediately for relevant examination.
Although gestational age mismatch is a common phenomenon, we should pay attention to it. Generally, the difference between one week and two weeks is within the normal range. After all, some errors are allowed in anthropometry.
If the fetus is too small or too big during the examination, the doctor will remind the pregnant mother to check the color Doppler ultrasound regularly and solve the problems in time.
Therefore, pregnant mothers should not be too nervous, and relaxation is the best help for the fetus. In fact, many pregnant women will have this situation. Some are too big and some are too small. As long as it does not match the gestational age, pregnant women will be very worried. In fact, the size of fetal development does not match the gestational age. The following reasons are key. Only the right medicine can make you worry.
First, living habits
If you often stay up late after pregnancy, eat irregularly, or even smoke and drink, it will definitely affect the normal development of the fetus. Moreover, smoking and drinking not only affect the size of the fetus, but also have a bad influence on the fetus. Therefore, Ma Bao, who has these bad habits, should get rid of these bad habits in time after pregnancy for the sake of the fetus.
Second, their own diseases.
During pregnancy, Ma Bao suffered from certain diseases, which also affected the size of fetal development. For example, if Ma Bao is anaemic, the fetus will be lighter and develop worse. For another example, Ma Bao suffers from gestational diabetes, which will make the fetus grow too fast and overweight, and it is also easy to present the danger of macrosomia. Therefore, this also reminds Ma Bao that if the fetus is anemic, it should be made up quickly.
Third, maternal differences.
The size of fetal development is closely related to the maternal differences in Ma Bao. Most of the babies of those petite mothers are smaller and lighter. And those who are tall and slightly fatter, the fetus is either normal or bigger. In addition, some pregnant mothers have comprehensive and rich nutrition, and their fetuses develop well. And those who are partial to food and malnourished will give birth to smaller and lighter fetuses. Therefore, it is not accurate to judge the size of fetal development only by gestational age. If the fetus is all right and the nutrition can keep up, then you don't have to worry too much about whether the fetal size matches the gestational age. Fourth, placental function.
When my classmate was pregnant, she found that the placenta was too thick and too small, and every time she checked the fetus, it was always smaller than the gestational age. At that time, the doctor told her that the main function of placenta is to provide fresh blood to the fetus. If the placenta is too small, it may lead to insufficient blood supply to the fetus, and the nutrition cannot keep up, which will affect the growth and development of the fetus. If the placenta function is good and the blood, oxygen and nutrition obtained by the fetus are satisfied, it will develop well, otherwise it will simply develop less, which is inconsistent with the number of weeks of pregnancy.
Verb (abbreviation for verb) umbilical cord function
Similar to the function of placenta, umbilical cord is also an important conduit for delivering blood and nutrition to fetus. If the umbilical cord is knotted, there is a water sac, hematoma and only one umbilical artery, it will affect its transmission function and lead to slow fetal development. In this case, the size of the fetus is usually inconsistent with the gestational age. Therefore, when Ma Bao finds that the size of fetal development does not match the gestational age, don't worry blindly. Compare the reasons first to see if it is normal or needs to be supplemented with nutrition. It's normal if it's about a week younger. After seeing the reason in this way, pregnant mothers can worry a lot.
Normal, because everyone's physique is different, and the absorption is different. Some adults absorb more, and some fetuses absorb more. As long as they are too big or too small, there is no problem in a fixed range. If it is too big, it proves that the fetus absorbs better, and you need to adjust your diet, because the fetus is too big and gives birth naturally. If it is too small, then you need to strengthen nutritional supplements. It is best to weigh about 6 kg.
As the name implies, the gestation process and the actual growth and development process of a small life are very long. Moreover, there is no concept of fetus from the moment the expectant mother is pregnant to a long time after that, that is to say, in addition to implantation, the combination of sperm and eggs is needed to form an embryo, so that continuous development gradually becomes a fetus in the sense of representation. In other words, generally speaking, the main reason is that after the early pregnancy, the fetus will completely enter a stable development stage, and everyone will be worried. The size of the fetus does not match the actual number of weeks of pregnancy. What's going on here?
Generally speaking, all the development of the fetus during pregnancy is normal, but there will be no problem if the weight of the fetus deviates. If the expectant mother reasonably controls or supplements nutrition during pregnancy, it will be well solved. Because Ma Qian herself had this situation during pregnancy. Pregnancy is about 6 months, which shows that the fetus is 2 weeks younger than the actual gestational age. The main reason is that my morning sickness reaction is relatively large, and I didn't supplement the corresponding nutrition, which led to the phenomenon of fetal nutrition deficiency. However, in the second and third trimester, I still achieved the actual number of weeks of pregnancy through nutrition supplementation. Therefore, before recovery, it is necessary to carefully examine and analyze the specific reasons why the fetal size does not match the actual gestational age.
Then expectant mothers may sometimes hear that the fetus is too big or too small during the examination. So does this mean the gestational age or the weight of the fetus? So what are the main factors that lead to the inconsistency between the fetal size during pregnancy and the actual gestational age? 1, the physical condition of the expectant mother.
The size of fetal development is actually closely related to the physical differences of expectant mothers. Most of the babies of those petite expectant mothers are smaller and lighter. And those who are tall and slightly fatter, the fetus is either normal or bigger. In addition, some pregnant mothers are full of nutrition and their fetuses develop well. And those pregnant mothers who are partial to malnutrition will also give birth to smaller and lighter fetuses. Therefore, it is not accurate to judge the size of fetal development only by gestational age parameters. If the fetus is normal and the nutrition can keep up, then the pregnant mother doesn't have to worry too much about whether the fetal size is consistent with the gestational age.
2. Affected by placental development.
I remember that every time my best friend went to a pregnancy test, the placenta was too thick and too small, and every time she checked the fetus, it was always smaller than the gestational age. At that time, the doctor told her that the main function of placenta is to provide fresh blood to the fetus. If the placenta itself is too small, it may lead to insufficient blood supply to the fetus and affect the growth and development of the fetus. If the placenta function is good and the fetus gets enough blood, oxygen and nutrition, it will develop well, otherwise it will be easy to develop small and inconsistent with the number of weeks of pregnancy.
3. Umbilical cord vascular function develops normally.
Similar to the function of placenta, umbilical cord is also an important pipeline to transport blood and nutrients to fetus. If the umbilical cord is knotted, there is a water sac, there is a hematoma, and there is only one umbilical artery, it will affect its transmission function and lead to fetal growth retardation. When this situation is checked, the fetal size generally does not match the gestational age.
4. The expectant mother's own health status
During pregnancy, expectant mothers suffer from certain diseases, which will also affect the size of fetal development. If anemia occurs during pregnancy, the fetus will be lighter and stunted; Pregnant women with gestational diabetes will make the fetus develop too fast and weigh too much, which is easy to have the risk of macrosomia. So this is also to remind expectant mothers to supplement in time when the fetus is anemic, so the health status of expectant mothers is related to the size of the fetus.
5. Bad eating habits during pregnancy
During pregnancy, if expectant mothers often stay up late and eat irregularly, especially with smoking and drinking, it will also affect the normal development of the fetus. Moreover, smoking and drinking not only affect the size of the fetus, but also have a negative impact on the fetus. Therefore, it is suggested that pregnant mothers with these bad habits should actively get rid of these bad habits after pregnancy for the sake of the fetus.
5. Genetic factors
If both husband and wife are tall, then the children born are generally tall.
Of course, in addition to the above factors, if the fetus develops abnormally during pregnancy, that is, the fetus has some congenital diseases during pregnancy and its development will be slower, then it will be smaller than the normal baby after birth. In addition, under normal circumstances, male babies are generally taller than female babies during pregnancy.
Therefore, when expectant mothers find that the size of fetal development does not match the actual gestational age, don't worry blindly. First, compare the causes to see if it is a normal phenomenon or needs to be supplemented with nutrition. It's normal if it's about a week younger. In this way, after prescribing the right medicine according to the specific reasons, everyone will be relieved.
Of course, when it comes to whether the fetus is too big or too small during pregnancy, many expectant mothers will worry about whether the expected date of delivery will be advanced or postponed. Actually, there is no need to worry.
Generally speaking, the expected date of delivery of the fetus will not be affected by fetal development or fetal size during pregnancy. The size of the fetus generally reflects the degree of nutrition absorption and development of the fetus. Whether it is too big or too small is mainly related to nutrition. Of course, it does not rule out that there are other factors that affect the size of the fetus.
The time the fetus stays in the expectant mother's body will not be affected by the development of the fetus, so whether the fetus is too big or too small, the expected date of delivery will not be advanced or postponed.
However, the expected date of delivery may also be affected by other factors, and generally speaking, the expected date of delivery is only calculated according to the regularity of the expectant mother's menstrual period, which is not necessarily 100% accurate. It is normal to appear sooner or later during pregnancy, so don't be too anxious.
Hello, I'm Xiaoxi, a pregnant mother, and now I'm pregnant with my first child for 22 weeks!
My pregnancy test is about a week longer than my last menstrual period, which should be related to my own reasons. Please watch the video!
It is a common phenomenon that pregnant mothers find that the size of fetal development does not match the number of weeks of pregnancy.
Generally speaking, the error is within 2 weeks, no other diseases, normal.
The pregnant mother's physical examination due to operational errors estimated the gestational age by means of B-ultrasound, uterine height and abdominal circumference. So there are some inevitable mistakes.
Usually the error is normal within 2 weeks, so pregnant mothers don't need to worry too much.
However, since this point is mentioned, what factors are actually affected by whether the fetus is too big or too small?
Maternal body shape If the expectant mother is petite, then the fetus may be too small due to genetic and other factors.
In addition, if the abdominal circumference is used to calculate the fetal size, there will be some errors, which have a great relationship with the thickness of the maternal fat layer.
Some pregnant mothers have less abdominal fat, so the error will be small;
Some pregnant mothers have more abdominal fat, so the error will be bigger.
Placenta and umbilical cord function Fetuses obtain nutrients and oxygen from the mother through the placenta and umbilical cord.
If the placenta and umbilical cord function well and the fetus can get enough nutrition and oxygen, it will develop well;
On the contrary, if the function of placenta and umbilical cord is not very good, such as umbilical cord knotting, single umbilical artery, etc. , will affect the transport of oxygen and nutrients, affect the development of the fetus and weight gain.
The maternal nutritional status is first of all sugar, which is one of the most important functional substances in the human body.
If the maternal blood sugar is normal, then the fetus will generally develop normally.
If the maternal blood sugar is high and even gestational diabetes occurs, then the possibility of fetal distress and fetal distress will be greater.
Gestational diabetes is very harmful to both mother and fetus. Pregnant mothers must adjust their diet and control their blood sugar.
The first thing to do is to control diet and avoid overnutrition.
In addition, if the mother is malnourished, it will also affect the support for the fetus, leading to fetal growth retardation.
In addition, other maternal conditions, such as hypertension and metabolic diseases, will adversely affect the growth and development of the fetus.
Therefore, if it is found that the actual gestational age error of the big and small fish of the fetus exceeds two weeks, it is necessary to consult a doctor and make adjustments or treatments according to the doctor's advice.
Expectant mothers do pregnancy tests, and the gestational age is estimated by methods such as B-ultrasound, uterine height and abdominal circumference, so there will be some errors in many cases. In general, this error is normal within two weeks. In other words, it is normal that the gestational age of pregnancy test is two weeks larger or smaller than the actually calculated gestational age, so expectant mothers need not worry too much.
The pregnant mother's abdominal circumference is also a way to speculate on fetal changes. If the fetus gets bigger, the pregnant mother's abdominal circumference will also change relatively. In the third trimester, it is normal for the pregnant mother's abdominal circumference to increase by 0.85 cm per week, but it is not that the abdominal circumference has increased, or the fetus has become bigger, because some pregnant mothers still have long meat and no fetus, so the change of abdominal circumference does not mean that the fetus is developing well.
Although gestational age mismatch is a common phenomenon, we should pay attention to it. Generally, the difference between one week and two weeks is within the normal range. After all, some errors are allowed in anthropometry. If the fetus is too small or too big during the examination, the doctor will remind the pregnant mother to check the color Doppler ultrasound regularly and solve the problems in time.
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