In a non stress test performed in the labor room, fetal bradycardia is a danger sign indicating fetal distress (hypoxia).

Why does fetal hypoxia cause bradycardia while hypoxia in adults cause tachycardia? What is the mechanism for both and why is it reverse?

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    $\begingroup$ Are you aware that in adults with hypovolemia, bradycardia is a sign of an impending cardiac arrest? Not saying ths is the answer, but asking if you're aware that the end point is similar. $\endgroup$ – anongoodnurse Feb 6 '17 at 22:55

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