Immunoglobulin crossing placenta is_________________?

Correct answer: C. Ig G

  • A. Ig M
  • B. Ig A
  • C. Ig G
  • D. Ig D

Explanation

IgG is the only major immunoglobulin that crosses the placenta in significant amounts, providing passive protection to the fetus and newborn. IgM is too large to cross normally.

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