Whether you're expecting a baby or have already received the good news, you're probably wondering a thousand things about the little one in your womb. How valuable would it be to know a little about your baby's health? That's why, today we're going to talk about something that can sometimes occur during pregnancy, but can be prevented if you're aware of it beforehand. That's neural tube defects , or as doctors call them ``Neural Tube Defects - NTDs''. Don't worry, we'll talk about this simply, in a way that you can understand.
What are neural tube defects (NTDs)? Simply put...
Simply put, NTDs are a type of congenital condition . That is, they are conditions that occur while the baby is still in the womb. They mainly affect the baby's brain, spinal cord, or spinal cord (the nervous system that runs through the spine). Remember, these defects often occur before you even know you are pregnant, usually within the first month of pregnancy.
This is what usually happens. When a baby first starts developing in the womb, the two sides of the baby's spine fuse together, forming a tube-like structure. This is what we call the neural tube . This neural tube is what will later develop into the baby's brain and spinal cord. So, if this neural tube doesn't close properly, if there is a small gap or deficiency somewhere, then this condition called NTD occurs. It's like when you build a roof, if there is a gap somewhere, water will leak from the roof.
What are the main types of NTDs?
There are several main types of neural tube defects (NTDs). Let's look at each one in turn:
1. Spina Bifida
This is the most common type of NTD. Spina Bifida is a condition in which the neural tube does not close completely at some point along the spine during fetal development. Again, there are several subtypes:
- Myelomeningocele (Open Spina Bifida):
Imagine, when some babies are born, you can see a sac filled with water protruding from the back of their spine. This is called `(Myelomeningocele).` Inside the sac may be part of the baby's spinal cord, the tissues that cover it `(Meninges)`, nerves, and even the fluid that surrounds the brain `(Cerebrospinal Fluid - CSF)`. This is the most severe and common form of `(Spina Bifida).`
- Meningocele:
In this case, a fluid-filled sac may have come out of the baby's back. However, in this case, the baby's spinal cord is not damaged, meaning the spinal cord is not inside the sac.
- Spina Bifida Occulta:
This is the mildest form of `(Spina Bifida)`. In this, the baby has a small opening in the spine, but no visible sac has formed. There is no damage to the spinal cord or nerves. Most of the time, it does not cause any problems. Sometimes, you may not even know you have it for the rest of your life.
2. Anencephaly
This is a serious condition. Anencephaly is a condition in which the top part of the neural tube, where the brain develops, does not close properly during fetal development. As a result, the baby's skull, skin, and brain do not develop properly. Some parts of the brain and skull may be completely missing. The developing brain tissue is usually exposed because there is no skin or bone to cover it. Sadly, babies with this condition are often stillborn or die shortly after birth.
3. Encephalocele
This occurs when the neural tube fails to close properly near the brain, creating an opening in the skull. The baby's brain and the membranes that cover the brain (meninges) can protrude through this opening, creating a sac-like protrusion. Sometimes, there may be only a small opening in the nasal cavity or forehead, which is not very noticeable.
4. Iniencephaly
This is also a very serious and rare condition. It causes severe deformities of the spine. In most cases, the neck is completely absent, and the head may be bent back so far that the baby's face may be attached to the chest and the skin on the back of the skull may be attached to the back. Babies with this condition are usually stillborn.
Who do these NTDs affect? How common are they?
NTDs are conditions that occur at birth, meaning they affect the developing baby . They also occur within the first month of pregnancy.
According to statistics in some countries of the world, `(NTDs)` are not very common, but it is important to be aware of them. For example, in the United States of America, this condition is seen in about 3000 pregnancies per year. Among them, `(Spina Bifida)` and `(Anencephaly)` are the most common. Although it is difficult to find exact statistics in Sri Lanka, it is important to remember that these conditions can occur in anyone.
Why do these neural tube defects (NTDs) occur?
In fact, doctors and scientists still can't say for sure what the single cause of these NTDs is. However, they believe that it is a complex combination of genetic, nutritional, and environmental factors .
It has been found that a major cause of this is a low folic acid level in the mother's body, especially before conception and in the early weeks of pregnancy . Folic acid or folate is an essential nutrient for the proper development of the baby's brain and spinal cord.
What are the symptoms of NTDs?
Each type of NTD has its own unique symptoms.
Some babies with NTDs do not show any symptoms . However, others can have serious problems . As mentioned earlier, babies with iniencephaly and anencephaly often die at birth or shortly after birth.
Common symptoms of NTDs include:
- Physical problems - for example, paralysis (loss of limbs), inability to control urine and stool.
- Loss of vision (blindness).
- Hearing loss (deafness).
- Intellectual disabilities.
- Unconscious states, sometimes even death.
If doctors suspect that your baby has a ``(NTD)'', they will tell you more about this, as these conditions can vary from one baby to another.
Does the mother experience any symptoms during pregnancy?
No. Even if your baby has a ``(NTD)'', you will not experience any specific symptoms related to it. Doctors detect these through tests during pregnancy.
How are these `(NTDs)` identified?
Doctors usually diagnose NTDs through prenatal tests during pregnancy. Ultrasound scans are particularly important for this.
What tests are used to identify NTDs?
Doctors use these tests to detect NTDs before a baby is born:
- Blood Test: Between 16 and 18 weeks of pregnancy, your doctor may order a test to measure a protein called alpha-fetoprotein (AFP) in your blood. If your baby has a NTD, the mother's blood levels of this protein are usually higher than normal (about 75% - 80%). If your AFP levels are high, your doctor may order further tests, such as an ultrasound scan.
- Fetal (Prenatal) Ultrasound: An ultrasound scan during pregnancy is the most accurate way to detect several NTDs. Doctors usually recommend scans in the first trimester (weeks 11-14) and the second trimester (weeks 18-22). These scans examine the baby's spine and head to see if there are any signs of NTDs.
- Amniocentesis: This test can check for NTDs and other birth defects. It involves using a needle to take a small sample of the amniotic fluid that surrounds the baby. This is usually done between 15 and 20 weeks of pregnancy. However, there are some risks associated with this test, so talk to your doctor about it.
Sometimes, some NTDs can be detected after the baby is born through imaging tests such as an MRI (Magnetic Resonance Imaging) or a CT (Computed Tomography) scan.
What are the treatments for NTDs?
For conditions such as `(Spina Bifida)` and `(Encephalocele), there are several treatment options depending on the severity of the condition.
Unfortunately, there is no cure for Anencephaly and Iniencephaly. Such babies usually die at birth or shortly after birth.
Treatment for `(Spina Bifida)` and `(Encephalocele)`
Treatment for both conditions depends on the severity of the condition and whether the baby has other complications. Surgery is the main treatment for both.
Encephalocele is usually treated surgically, where the part of the brain that has protruded from the baby's skull, along with the membranes surrounding it, is put back inside the skull, closing the opening in the skull.
Myelomeningocele, the most common form of spina bifida, is usually treated with surgery to repair the opening in the baby's spine. This surgery can be done before the baby is born (fetal surgery) or soon after birth (postnatal surgery) .
Both of these conditions may require long-term treatment , depending on the child's condition. Over time, more surgery may be needed, or complications such as hydrocephalus, which is the buildup of excess fluid around the brain, may need to be treated.
What are the risk factors for developing a NTD?
Any woman can have a baby with a ``(NTD)``. However, certain factors can increase this risk. Let's see what they are:
- Folate (folic acid) deficiency: This is very important. Folate is a type of vitamin B-9. It is essential for the healthy development of the baby. If folic acid is not enough before conception and in the first few months of pregnancy, there is a higher chance of developing an NTD like Spina Bifida.
Therefore, if you are planning to get pregnant, or are already pregnant, it is very important to take the prenatal vitamins prescribed by your doctor. It is generally recommended to take at least 400 micrograms (mcg) of folic acid daily. It is also a good idea to eat foods rich in folate (such as spinach, pears).
- Family history of neural tube defects: A mother who has had a baby with a previous NTD has a 2% to 3% increased risk of having another baby with the same defect. If you want to know more about this, it is a good idea to see a genetic counselor.
- Certain antiseizure medications: These medications can increase the risk of NTDs if taken during pregnancy. If you are taking medication for epilepsy, talk to your doctor before you get pregnant to learn how the medication will affect your pregnancy.
- Diabetes: Pregnant mothers with poorly controlled diabetes are at increased risk of having a baby with a NTD.
- Obesity: This risk is also higher for mothers who are obese before pregnancy.
- Increased body temperature in early pregnancy: If your body temperature increases (hyperthermia) in the early weeks of pregnancy, whether due to a persistent fever or from using a sauna or hot tub, there is a small risk of developing NTDs.
- Opioid use in early pregnancy: Opioids are a type of painkiller that can be highly addictive. If you use them in the first two months of pregnancy, you are more likely to have a baby with a NTD. If you are pregnant and are taking any medication that may contain opioids, tell your doctor right away.
Can a baby with a `(NTD)` survive?
Yes, babies with some neural tube defects like `(Spina Bifida)` and `(Encephalocele)` can survive. However, as mentioned earlier, babies with `(Anencephaly)` and `(Iniencephaly)` often die at birth or shortly after birth.
Babies with `(Spina Bifida),` especially `(Myelomeningocele)` or `(Encephalocele),` are at increased risk of nerve damage. This can lead to conditions such as paralysis. The nerve damage and loss of function present at birth is usually permanent. However, there are a number of treatments that can help prevent further damage and complications.
Some babies with ``Spina Bifida'' can survive without any complications or with very minor complications.
How do I take care of my baby with a `(NTD)`?
It is important to remember this: Not all babies with NTDs are the same. Especially babies with Spina Bifida and Encephalocele are affected differently. It is impossible to predict exactly how your baby will be affected. The best thing you can do is talk to your doctor about your baby's condition and get advice from them.
As your child grows, he or she may need the help of a team of doctors to provide the various care they need. It is very important to advocate for your child and ensure that they receive the best medical care possible.
When should I see a doctor about NTDs?
If your child is born with an NTD, they will need to see a doctor or medical team regularly to take care of them for the rest of their life.
If you are taking medication for epilepsy or opioids, talk to your doctor before you get pregnant to learn how the medication will affect your pregnancy and the possibility of having a baby with an NTD.
It's normal to feel scared and shocked when you find out that your baby has a ``(NTD)''. But remember, you are not alone. There are many resources that can help you and your family. It is important to talk to a doctor who is knowledgeable about ``(NTDs)'' to learn how your baby will be affected and how to prepare for it.
Finally, things we need to remember (Take-Home Message)
I hope this discussion has given you some insight into ``Neural Tube Defects - NTDs''. The most important thing is to be aware of these in advance.
- (NTDs) are developmental defects that occur in the baby's brain and spinal cord during the early weeks of pregnancy.
- Folic acid is a very important nutrient for preventing these conditions. Taking folic acid daily from the time you plan to get pregnant and during the first few months of pregnancy can significantly reduce the risk of NTDs.
- NTDs can be detected through ultrasound scans during pregnancy.
- Although some NTDs have treatments, such as surgery, some severe conditions have no treatment.
- If you have any questions or concerns about NTDs, be sure to talk to your doctor.
We hope this information is helpful to you. May you find the strength to have a healthy baby!
` Neural Tube Defect, NTD, Spina Bifida, Anencephaly, Folic Acid, Pregnancy, Birth Defects, Neural Tube Defects
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