We investigated maternal copeptin level's usefulness in prediction of preterm birth. The study was comprised of 97 pregnant women hospitalized for threatened preterm labor and 35 healthy pregnant women without preterm labor. Serum copeptin were compared with likelihood of threatened preterm labor timing of delivery and time interval to delivery. Copeptin level of threatened preterm labor group was higher than of control group [7.76(0.39-35.62) ng/mL, 6.23(1.64-36.88) ng/mL, respectively, = .04]. Copeptin levels of women did not differ according to preterm or term birth [7.76(0.69-35.62) ng/mL, 6.73(0.39-36.88) ng/mL, respectively, = .22). Quartiles of copeptin levels were not associated with risk status or preterm birth. Serum copeptin is higher in threatened preterm labor. It does not differentiate those with threatened preterm labor verses preterm birth.
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