Abstract
Comparisons were made between the maternal blood sugar and FFA levels during the first stage of labor and at delivery. In all patients studied of various parities both blood sugar and FFA levels are higher at delivery than during the first stage of labor. The increments of rise of blood sugar and FFA concentrations are not correlated with the length of labor between the labor sample collection and delivery, the degree of cervical dilatation at the time of labor sample collection, or the length of fast prior to labor sample collection. It appears that the rise in blood sugar and FFA occurs late in labor, possibly exclusively during the second stage of labor, and may possibly be related to catecholamine release during this period.
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