Serum glucose levels were measured in 50 nondiabetic pregnant women between 33 and 43 weeks' gestation following a nonstress test (NST) to determine the relationship between maternal glucose levels and the results of the NST. Two comparable groups of 25 patients each were formed based on the NST results, reactive and nonreactive. Overall, maternal glucose level for the study population was 71.3 +/- 20.1 mg/dl. Although the difference was not statistically different, the nonreactive NST group did demonstrate slightly higher glucose levels (71.6 +/- 17.3 mg/dl) than did the reactive group (70.9 +/- 17.3 mg/dl). Furthermore, patients studied for suspected intrauterine growth retardation or who had a history of a prior stillbirth had significantly lower (P<.025) glucose levels than those tested for other indications. These results suggest that there is no correlation between the NST results and maternal serum glucose concentrations in a nondiabetic population. The significantly lower maternal glucose levels observed in the intrauterine growth retardation and prior stillbirth groups warrant further investigation.
(C) 1982 The American College of Obstetricians and Gynecologists