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Updated: Nov 4, 2025

The 4-vessel Sampling Approach to Integrative Studies of Human Placental Physiology In Vivo
Published on: August 2, 2017
Pulsatility of the umbilical cord in full-term natural childbirths
Thamires Ribeiro Marques Mendonça1, Regina Célia Sales Santos1,2, Pollyana Campos Lima2
1Universidade Federal de Alagoas (UFAL), Escola de Enfermagem. Maceió, Alagoas, Brasil.
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.
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