Understanding neural tube defects may also help you feel more prepared during pregnancy planning.
What Are Neural Tube Defects (NTDs)?
Neural tube defects are birth defects. These complications happen when the neural tube does not form optimally during early pregnancy.
The severity can differ widely from one baby to another.
The following are the different types of neural tube defects:
It is the most common form of defect.
Features
- The spinal bones fail to close properly
- Part of the spinal cord may remain exposed
- Nerves may become damaged
A child may experience:
- Weakness or paralysis in the legs
- Difficulty walking
- Curvature of the spine
- Bladder and bowel control problems
- Frequent infections in the urinary tract
- Impaired learning abilities in some cases
2. Anencephaly
It is a severe form of neural tube defect. It mainly involves the brain and skull.Features
- Major brain parts do not develop properly
- Certain skull regions may be partially formed or completely missing
3. Encephalocele
In this condition, brain tissue protrudes out through any opening in the skull. It is a rare defect.The symptoms may range from mild to severe. In severe forms, the condition might affect facial or neurological development.
Why Neural Tube Development Matters
The neural tube is the foundational tissue that develops into your baby’s nervous system (brain, spinal cord, and nerves).
All these structures are vital for a human being to lead a healthy and fulfilling life.
Since the risk of these defects developing is higher in the early months of pregnancy, early care, proper nutrition, and antenatal testing are highly crucial
How Does the Neural Tube Develop Normally?
The two sides of the foetus's spine fuse to shield the spinal cord, spinal nerves, and meninges (tissue layers covering brain tissue).
All of this generally happens during your first month of pregnancy. In the early stages, the developing brain and spinal tissue are called the neural tube.
As development progresses, the brain emerges from the upper part of the neural tube.
The remaining portion forms the spinal cord.
When this tube fails to close properly at some point along its length, an NTD develops.
What Causes Neural Tube Defects?
The exact cause behind NTDs is still under research. Generally, genetic, nutritional, environmental, and medical factors play a role.The following are the risk factors that may increase the risk of NTDs:
| Risk Factor | Description |
| Folate deficiency | Folate is important for the healthy development of the baby. |
| History of neural tube defects | If you have a history of one baby with an NTD, you have a 2% to 3% increased risk of having another baby with an NTD. |
| Certain antiseizure medications | These medications can cause neural tube defects when taken during pregnancy. |
| Pre-existing diabetes | Having poorly managed diabetes during pregnancy puts you at a higher risk of having a baby with an NTD. |
| Obesity | If you have obesity before pregnancy, you have an increased risk of having a baby with an NTD. |
| Increased body temperature in early pregnancy | Increases in core body temperature in the early weeks of pregnancy have been associated with a slightly increased risk of NTDs. This may be due to a prolonged fever or use of a sauna or hot tub. |
Why Folic Acid Is Important for Preventing Neural Tube Defects
Folic acid (a form of vitamin B9) promotes cell growth and neural tube formation during foetal development.Natural food sources of folate
You may get folate from foods such as:- Spinach
- Fenugreek leaves
- Mustard greens
- Lentils
- Chickpeas
- Oranges
- Groundnuts
- Fortified cereals
People who are at high-risk may require higher doses.
Generally, your risk is analysed before conception and treatment is planned accordingly.
What Are the Complications of Neural Tube Defects
Possible physical complications
- Difficulty moving the legs
- Muscle weakness
- Paralysis
- Bone deformities
- Joint stiffness
- Poor coordination
Bladder and bowel complications
- Urinary incontinence
- Difficulty emptying the bladder
- Constipation
- Recurrent urinary tract infections
Brain-related complications
- Learning ability
- Memory
- Concentration
- Speech development
- Hydrocephalus (excess fluid builds up inside the brain)
How Are Neural Tube Defects Diagnosed During Pregnancy?
Early screening helps doctors identify many neural tube defects before birth.Maternal blood screening
A blood test during pregnancy may measure alpha-fetoprotein (AFP) levels.Abnormal AFP levels may sometimes suggest:
- Spina bifida
- Other congenital conditions
Ultrasound scans
Detailed ultrasound scans are important for detecting structural abnormalities.Doctors may identify:
- Spinal defects
- Brain abnormalities
- Skull development problems
- First trimester scan
- Mid-pregnancy anomaly scan
Amniocentesis
In selected cases, doctors may recommend amniocentesis.This procedure involves testing amniotic fluid for abnormalities.
It is generally advised only when medically necessary.
Treatment and Care Options
Treatment depends on:- The type of neural tube defect
- Severity of symptoms
- Presence of associated complications
Before birth
In certain severe cases of spina bifida, foetal surgery may be considered.This specialised surgery is available only in selected centres and requires careful evaluation.
Surgery after birth
Some babies may need surgery soon after delivery to:- Protect the spinal cord
- Reduce infection risk
- Repair structural defects
Long-term rehabilitation
Ongoing support may include:- Physiotherapy
- Occupational therapy
- Mobility aids
- Orthopaedic care
- Speech therapy
- Educational support
Learning that your baby might develop a neural tube defect (NTD). It may turn your world upside down. You may have a million questions in your mind. But you’re not alone. The experts can help you prepare and deal with the situation in the most appropriate manner.
Whether you’re pregnant, a new mom, or navigating postpartum, you don’t have to do it alone. Join our support group to connect, share, and support one another.
FAQs on Neural Tube Defects: Prevention, Early Signs, and Care Options
- Can neural tube defects happen even in healthy pregnancies?
Yes. Neural tube defects may sometimes develop even when there are no obvious risk factors. That is why early prenatal care and folic acid intake remain important for every pregnancy. - Is folic acid needed before pregnancy?
Yes. Neural tube formation happens very early, often before pregnancy is confirmed. Taking folic acid before conception may help lower the risk of neural tube defects. - Can children with spina bifida live independently later in life?
Many children with spina bifida can lead fulfilling and productive lives with proper care and comprehensive support.