Which vitamin supplementation gives to pregnant mother for prevention of NTD?

NORCET 3 - 2022 (Shift-2)

Obstetrics & Gynaecology

Easy

Appeared in: NORCET 3 - 2022 (Shift-2)

Explanation

Folic acid (Vitamin B9) is the specific nutrient proven to prevent neural tube defects (NTDs).
The neural tube closes very early in gestation (by the 6th week), which is why preconception supplementation is critical for prevention.
Folic acid is essential for DNA synthesis, cell division, and the proper development of the embryonic nervous system.
Major health organizations recommend daily folic acid supplementation for all women of childbearing age to reduce the risk of NTDs like spina bifida and anencephaly.

Option A: Iron is supplemented during pregnancy primarily to prevent maternal iron-deficiency anemia due to increased maternal blood volume and fetal demands. It has no role in preventing neural tube defects.
Option C: Calcium is crucial for fetal bone and teeth development and maternal bone health. It is also associated with a reduced risk of preeclampsia but does not influence neural tube formation.
Option D: Vitamin C is an antioxidant that aids in tissue repair and collagen synthesis. Its main role in pregnancy nutrition is often highlighted for its ability to enhance the absorption of dietary iron. It does not prevent NTDs.

Visual 1: Diagram - Illustrating the process of neurulation (the folding of the neural plate to form the neural tube) and comparing a properly closed neural tube to one with defects like spina bifida (open spine) and anencephaly (absence of a major portion of the brain).

Clinical Relevance

Nursing practice connection: This is primarily an exam-oriented knowledge point with limited direct bedside application, so retain Nutritional Supplementation for Prevention of Neural Tube Defects as background academic context rather than a clinical decision trigger.
Preconception counseling is a key nursing responsibility. Nurses must educate all women of reproductive age about the importance of taking 400 mcg of folic acid daily, as many pregnancies are unplanned and NTDs form before most women are aware they are pregnant.
Nurses should assess for high-risk factors during the initial prenatal visit, such as a history of a prior NTD-affected pregnancy, use of antiepileptic medications (like valproic acid), or maternal diabetes, which require a higher 4 mg daily dose of folic acid.
What if? If a pregnant patient is taking valproic acid for epilepsy, her risk for having a child with an NTD is significantly increased. The nurse's priority is to ensure the patient is aware of this risk and is taking the high-dose (4 mg) folic acid supplement, in consultation with her obstetrician and neurologist.

How to Approach the Question

Identify the core question: The question asks for the specific vitamin supplement to prevent Neural Tube Defects (NTDs).
Analyze the keywords: 'Prevention' and 'NTD' are the most critical terms.
Recall foundational knowledge: Access your knowledge of prenatal nutrition and common birth defects.
Connect the keywords to the correct nutrient: The link between folic acid deficiency and NTDs is a fundamental concept in obstetrics and pediatrics.
Evaluate the options: Systematically rule out the other supplements by recalling their primary functions in pregnancy (Iron for anemia, Calcium for bones/preeclampsia, Vitamin C for iron absorption/antioxidant).
Confirm the answer: Select Folic acid as the only option directly responsible for preventing NTDs.

Concept Tested & Keywords

Concept Tested: Nutritional Supplementation for Prevention of Neural Tube Defects
Stem keywords: vitamin supplementation, pregnant mother, prevention, NTD
Lead-in keywords: Which
Clinical cues: Age/sex group narrows the expected diagnosis, intervention, or normal reference range.

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