Pulsatility of the umbilical cord in full-term natural childbirths.

OBJECTIVE: Measure umbilical cord pulsatility time and evaluate correlation/association with maternal and neonatal characteristics. METHOD: Cross-sectional study, with 76 binomials, carried out in 2017, in a maternity hospital in Alagoas. Analysis with Pearson or Spearman correlation test and Mann-Whitney or Kruskal-Wallis test. RESULTS: Sixty-two parturients and their newborns participated of the research. The women had a gestational age ≥ 37 weeks, natural cephalic birth, without distortions. The newborns had average weight of 3326.29g, mostly male. The umbilical cord pulsatility time was 285.48s. There is a correlation between umbilical cord pulsatility time and placental delivery time (p<0.001). Other correlations/associations were not significant. CONCLUSION: It suggested using a correlation between pulsatility time and placental delivery time in clinical decision making for good practices in childbirth assistance.