Which antibody,if present at birth,indicates | vedclass

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(A) $IgG$ is the only antibody that can cross the placenta from the mother to the fetus. Therefore,its presence at birth is expected as it is derived

Vedclass · Accepted Answer

$IgM$

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(A) $IgG$ is the only antibody that can cross the placenta from the mother to the fetus. Therefore,its presence at birth is expected as it is derived from the mother. $IgM$ is a large pentameric molecule that cannot cross the placental barrier. If $IgM$ is detected in the blood of a newborn,it indicates that the fetus has produced it in response to an intrauterine infection,as the fetus's own immune system has been activated.

Which antibody,if present at birth,indicates that the fetus has been infected (intrauterine infection)?

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