Excluding fetal growth retardation, there is little difference between babies born at 38 weeks of pregnancy and those born at 40 weeks. But there are still some differences. But this difference is limited to artificial caesarean section in advance. If the fetus develops rapidly, it starts at 38 weeks, which is no different from the baby born at 40 weeks.
The difference between the 38th and 40th weeks of pregnancy is two weeks, that is, 14 days. If the fetus is born at 38 weeks, it is equivalent to half a month earlier than the expected date of delivery. It is said that the melon is ripe and the baby is the same. At a certain time, the fetus will naturally begin to be born. Except for a few people, of course. Although 38 weeks of pregnancy is full-term, it is just at the boundary of normal delivery and just qualified, while 40 weeks of pregnancy is the best delivery time, neither too early nor too late.
Therefore, if the fetus starts naturally, there is no difference between being born at 38 weeks and being born at 40 weeks. If you want to have a caesarean section, you can wait until 40 weeks later if there is no danger to the health of the fetus.
Fetal development at 38th week of pregnancy;
The fetus at 38 weeks' gestation is about 50cm in length, 6-7kg in weight and 9cm in biparietal diameter. At 38 weeks of pregnancy, the fetus has entered the basin and has been located. The sensory system and nervous system of the fetus have basically matured and have the conditions for survival after birth.
Fetal development at 40 weeks of pregnancy;
At 40 weeks of pregnancy, the fetus is about 52cm in length, 7 kg in weight and 9.3cm in biparietal diameter. At 40 weeks of pregnancy, the fetus has also delivered. The fetal sensory system and nervous system are sound, and the cardiopulmonary function is good.
Although there is no great difference in development between the fetus at 38 weeks of pregnancy and the fetus at 40 weeks of pregnancy, fetal fat will begin to peel off at 38 weeks. If it is a fetus born at 38 weeks, there should be a thick layer of white fetal fat on the newborn after birth. The 40-week-old fetus is smoother and cleaner after birth because a part of fetal fat has been stripped from the uterus.
Moreover, 37 weeks to 40 weeks is the peak of fetal growth and brain development. If the fetal weight is relatively small, there may be a difference of one catty between 38 weeks and 40 weeks. Neurological function is no more mature than that of 40 weeks. Of course, these are just some small differences. If the fetus develops rapidly during pregnancy, there is no difference between 38 weeks and 40 weeks.
There is not much difference between a baby born at 38 weeks of pregnancy and a baby born at 40 weeks of pregnancy, and there is not much difference in development. There are many well-developed babies born at 38 weeks, even more than those born at 40 weeks. Although the expected date of delivery for pregnant women is 40 weeks, the probability of giving birth to a baby due to the expected date is only 5%, and most babies will give birth earlier or later. So: whether it is 38 weeks or 40 weeks, there is not much difference. If it is a caesarean section, then under all normal circumstances, try to wait until 38 weeks later. After all, an extra day in the womb is better than a week outside.
First of all, let's understand the basic development of the fetus at 38 weeks and 40 weeks of pregnancy.
At 38 weeks' gestation, the fetal height is 45-5 1 cm, and the weight is almost 3200 grams. All organs of the body are developed, and the digestive system can handle water and waste. The fine villi and white fetal fat covered on the fetus gradually fall off and the skin becomes smooth. Fallen fetal fat and secretions enter the fetal mouth with amniotic fluid and are stored in the fetal intestine. They become fetal feces and are excreted within 65,438+0-2 days after birth. This week, most of the fetuses have entered the pelvis, and the fetal head swings in the pelvis. The baby's chin is close to his chest, his arms and legs are bent, and he is ready to give birth, waiting for birth instructions at any time.
After 40 weeks of pregnancy, the fetus has grown into a big girl, with a height of about 47-53 cm and a weight of about 3300-4000 grams. It is fully developed and can live outside the palace. Even in contact with the outside world, the baby's subcutaneous fat can completely regulate its body temperature. The bones and muscles are similar to those of newborns, but in order to pass through the birth canal later, the skull is still in a relatively loose state. When born, it will turn into five overlapping pieces like transformers and be slowly sent out of the birth canal!
This week, the white fetal fat that was originally covered on the fetus gradually peeled off, and the baby gradually became a white and clean baby.
Babies born at 40 weeks are smoother and cleaner.
As mentioned above, fetal fat began to fall off slowly at 38 weeks of pregnancy. Fetal fat is a white material attached to the fetus, which begins to form around 18 weeks of pregnancy. Mainly plays the role of nourishing and protecting the fetus from the stimulation of amniotic fluid, and preventing bacteria from invading the skin of the fetus, and can also play a role in lubrication when passing through the birth canal during childbirth. Usually, the fetal fat born earlier will be more than that born later, so the baby born at 40 weeks is smoother and cleaner.
② The immunity of infants born at 40 weeks is better than that of infants born at 38 weeks.
When I was pregnant, the doctor told me that it was better for the fetus to stay in the womb for a day than to stay outside for a week. Nature always has its rules. It makes sense to conceive in October instead of September. Although all organs have matured within 38 weeks (except the lungs need to be established within a few hours after birth), if the functions of various organs can be improved in the womb, the immunity will naturally be better, and the baby's ability to resist viruses and bacteria will be stronger than that of premature babies.
340-week-old babies are relatively smart.
"Let the child's brain be free" points out that before the fetal weight increases to 3.6 kg (7.2 kg), when the fetal weight increases steadily, the intelligence level will also increase steadily. In other words, the closer the baby's birth weight is to 7.2 kg, the smarter the baby is, and the IQ will drop if it exceeds 8 kg. The average weight of babies born at 40 weeks of pregnancy is close to 3.6 kilograms, so babies born at 40 weeks may be smarter than babies born at 38 weeks.
Many pregnant mothers will worry about whether the fetus will come out in the third trimester, some one week before the expected date of delivery, some 4 1-42 weeks. Pregnant mothers will worry about whether the baby is ripe or not, and whether it will be too ripe after the expected date of delivery. After 27 weeks, most pregnant mothers will have this kind of anxiety, which is normal.
My baby was born a week before the due date. When I came out, I weighed 6.5 kg, and I was white. Now he has been selling pots and irons. The kitchen and toilet are his usual places. As long as the fetus is born at full term, the problem is not big. For those who are not born after the expected date of delivery, there is no problem in the prenatal examination. As long as it does not exceed 42 weeks, it is normal to wait for the arrival of the child.
Fetus at 38 weeks' gestation: The fetus weighs about 3,200 grams and is about 52 centimeters long. The development of organs and bones has been basically completed. Many pregnant mothers say, if you come out at this time, what is the respiratory system of the fetus? Will it affect fetal breathing? It is out of the question. When the heart is 32 weeks old, the lungs of the fetus have developed well, so many 32-week fetal doctors do not recommend it, not only because of hidden dangers, but also because the lungs have developed well.
Fetus at 40 weeks' gestation: the biparietal diameter of the fetus is about 9 cm, the body length is 52 cm, the top and buttocks are 35 cm long, and the weight is about 3400 grams. At this time, the fetus is mature, which is what we often say. The skin of the fetus is pink and there will be a lot of subcutaneous fat. The face of the fetus is not as wrinkled as at 22 weeks, and its face and body shape are fuller. The skin on the soles of fetal feet is textured.
Is the fetus unhealthy and immature at 38 weeks? No, because the nutritional value of the fetus is higher now, and the fetus will mature faster. As long as the prenatal examination is normal, the fetus will be fine at this time and the fetus will be cooked when it comes out. Pregnant mothers don't have to worry too much
Many treasure moms feel that they are not born on the due date and are not so smart. This is groundless. As long as the fetus takes in nutrition, there is no congenital disease, and there is no major problem in the birth of the fetus.
There are many reasons why some fetuses are not born before the due date. It may be because the placenta is aging, which does not provide enough influence to the fetus and affects the development of the fetus. It may also be that the turbid amniotic fluid causes the fetus to swallow amniotic fluid, which leads to poor breathing and slow development.
There is a saying that by the third trimester, especially after 38 weeks, most of the baby's organs are almost developed, and then they will develop in a more perfect direction. After that, the key growth is actually the baby's height and weight. One more day in mom's belly is worth going out for a week. The baby is about 38 weeks old, indicating that his organs have just developed well and have not yet reached some kind of "consolidation". At this time, the baby will definitely "suffer" when he leaves his mother. The specific performance is that he is weaker and more prone to illness.
A baby born around 40 weeks can be said to have stayed in the mother's stomach for a whole pregnancy. At this time, the baby's development in all aspects is very mature, and it is just right for the baby to choose this time to be born. This is why babies born after 40 weeks in their mothers' stomachs are not easy to get sick.
Therefore, if conditions permit, a responsible mother will choose to let the baby stay in the belly for 40 weeks before being born, which is better for the baby and more worry-free for Ma Bao.
Complete pregnancy 40 weeks. After the fetus stays in the mother's uterus for 40 weeks, the amniotic fluid may begin to become turbid and the placenta will begin to age. At this time, their mission has been completed. When the baby is born during this period, the lung function will be more perfect. Relatively speaking, babies born at 38 weeks have weak lung function and will have more problems after birth.
There is a great difference in the development of brain nerves between babies born at 38 weeks and babies born at 40 weeks.
Many treasure moms don't know this. In fact, when the fetus is in the mother's belly, the brain nerve develops fastest from the 37th week to the 40th week. Babies born at or before the 38th week have suffered huge losses in this respect, and this loss cannot be made up the day after tomorrow. Some mothers will find that babies born before 38 weeks of pregnancy seem to be smarter than those born after 40 weeks of pregnancy, which may be the reason.
Although the baby born after 40 weeks in the mother's stomach will have advantages in many aspects, if the baby has not been born after 40 weeks in the stomach, the pregnant mother should also pay attention, because after that, if the amniotic fluid has become turbid and the baby still stays in the uterus, other problems may occur due to lack of oxygen.
Pregnant mothers with special diseases can consider giving birth early.
Although the baby will have some shortcomings in the early stage of birth, if the pregnant mother suffers from some special diseases, she should still consider giving birth in advance, otherwise the problem may be more serious, and this pregnant mother should also be aware of it.
Be pregnant in October and give birth once. Under normal circumstances, the baby will stay in the mother's stomach for 10 months, that is, it will be born in 40 weeks, but in fact, many expectant mothers will give birth around 38 weeks of pregnancy. My wife gave birth to small peas in 38 weeks +3 days. So, is there a difference between these two babies born at different stages?
38 weeks pregnant, the fetus is about 52cm long and weighs about 3000-3400 grams. At this time, the fetal head has completely entered the basin and will swing back and forth in the pelvis of the expectant mother, but the bones around the pelvis have a good protective effect on the fetus, so the expectant mother does not have to worry. At this time, the hair of the fetus has grown quite long, about 1-3 cm. Fetal hair is different, some are yellow and sparse (my baby is like this, just like his mother), and some are dark and thick. In addition to nutritional factors, heredity is also one of the reasons that affect the growth of fetal hair.
The 40th week of pregnancy is the period when the fetus is born. Usually, the fetus may be born within this week, but most babies will be born two weeks earlier or later. At this time, the fetus weighs about 3300-4000 grams and is about 50-52 cm long. At this time, not only the tissues and nerves of all parts of the fetus develop well, but also the original clear and transparent amniotic fluid in the uterus will become turbid and milky, and the function of the placenta will begin to deteriorate until the fetus completes its mission after birth.
At 38 weeks' gestation, the fetal height is 45-5 1 cm, and the weight is almost 3200 grams. All organs of the body are developed, and the digestive system can handle water and waste. The fine villi and white fetal fat covered on the fetus gradually fall off and the skin becomes smooth. Fallen fetal fat and secretions enter the fetal mouth with amniotic fluid and are stored in the fetal intestine. They become fetal feces and are excreted within 65,438+0-2 days after birth.
This week, most of the fetuses have entered the pelvis, and the fetal head swings in the pelvis. The baby's chin is close to his chest, his arms and legs are bent, and he is ready to give birth, waiting for birth instructions at any time.
After 40 weeks of pregnancy, the fetus has grown into a big girl, with a height of about 47-53 cm and a weight of about 3300-4000 grams. It is fully developed and can live outside the palace. Even in contact with the outside world, the baby's subcutaneous fat can completely regulate its body temperature. The bones and muscles are similar to those of newborns, but in order to pass through the birth canal later, the skull is still in a relatively loose state. When born, it will turn into five overlapping pieces like transformers and slowly come out of the intestines!
This week, the white fetal fat that was originally covered on the fetus gradually peeled off, and the baby gradually became a white and clean baby.
Babies born at 40 weeks are whiter.
As mentioned above, fetal fat began to fall off slowly at 38 weeks of pregnancy. Fetal fat is a white material attached to the fetus, which begins to form around 18 weeks of pregnancy. Mainly plays the role of nourishing and protecting the fetus from the stimulation of amniotic fluid, and preventing bacteria from invading the skin of the fetus, and can also play a role in lubrication when passing through the birth canal during childbirth. Usually, fetuses born earlier have more fat than those born later, so babies born at 40 weeks are whiter.
② The immunity of infants born at 40 weeks is better than that of infants born at 38 weeks.
When I was pregnant, the doctor told me that it was better for the fetus to stay in the womb for a day than to stay outside for a week. Nature has always had its laws, so it makes sense to get pregnant in October instead of September. Although all the organs have matured within 38 weeks (except the lungs need to be established within a few hours after birth), if the functions of various organs can be continuously improved in the uterus, the immunity will naturally be better and the baby's resistance to viruses and bacteria will be stronger.
340-week-old babies are relatively smart.
"Let the child's brain be free" points out that before the fetal weight increases to 3.6 kg (7.2 kg), when the fetal weight increases steadily, the intelligence level will also increase steadily. In other words, the closer the baby's birth weight is to 7.2 kg, the smarter the baby is, and the IQ will drop if it exceeds 8 kg. The average weight of babies born at 40 weeks of pregnancy is close to 3.6 kilograms, so babies born at 40 weeks may be smarter than babies born at 38 weeks.