[The influence of mode of delivery on retroplacental and peripheral serum concentrations of HPL and SP-1 (author's transl)].

The concentrations of HPL and SP-1 were measured in retroplacental and peripheral serum in patients who had an elective Caesarean section and in patients who had a spontaneous vaginal delivery. The peripheral concentration of HPL was significantly lower after vaginal delivery than after elective Caesarean sections (p < 0.001). The retroplacental concentration of serum-SP-1 after vaginal delivery was significantly higher than after elective Caesarean section (p < 0.001). After elective Caesarean section the retroplacental concentration of SP-1 was significantly lower than the peripheral concentration (p < 0.001), but after vaginal delivery the mean retroplacental and peripheral serum-SP-1 values were about equal.