Plasma @entity3009 in pregnant XXXX with term and preterm deliveries.

@entity1 @entity18314 @entity3152 @entity22775 @entity3009
Because of the involvement of prostaglandins in the labor mechanism, it was hypothesized that elevated @entity3009 levels would presage preterm deliveries. A comparison of plasma @entity18314 ( @entity22775 ) levels was made between pregnant @entity1 who eventually delivered at term (N = 22) and those who delivered preterm (N = 17). Maternal blood was collected from each @entity1 at approximately 1-week intervals between 16 and 40 weeks' gestation and during labor. Mixed cord blood was also obtained at delivery. @entity22775 was measured in plasma by radioimmunoassay. Plasma @entity22775 concentrations did not vary throughout pregnancy. @entity22775 concentrations did increase during labor, and the highest levels were found in cord blood at delivery. Mean @entity22775 levels during labor and in cord blood were not significantly different between the preterm and term groups. In 1 @entity3152 @entity1 the @entity22775 concentration during labor was higher than that of all other @entity1 , including those who delivered at term. Excluding this @entity1 , @entity3152 @entity22775 concentrations were significantly lower (P less than .05) than those at term. In general, the study provides evidence that most cases of @entity3152 are not characterized by elevated @entity3009 levels.
