🤰 Antibody that Crosses Placenta

Let’s understand this in a very simple way.

What is the question asking?
Which antibody can pass from mother to baby through placenta.

Which antibody crosses placenta?

✅ Correct Answer: (b) IgG

Why IgG?
IgG is the only antibody that can cross the placenta.

👉 It provides passive immunity to the newborn baby.

What does this mean?

• Baby gets protection from infections
• Immunity comes from mother
• Protection lasts for few months after birth

Why other options are not correct?

• (a) IgA → ❌ Found in breast milk, not placenta
• (c) IgE → ❌ Involved in allergy reactions
• (d) IgM → ❌ Too large to cross placenta

Simple Exam Trick:
G = Goes through placenta → IgG

📌 Disclaimer: For exam preparation only. Follow clinical guidelines in practice.

💚 Exam Objective Nursing – Asha D
Concept clarity • Easy recall • Nursing success