JOURNAL OF SHANDONG UNIVERSITY (HEALTH SCIENCES) ›› 2014, Vol. 52 ›› Issue (7): 75-77.doi: 10.6040/j.issn.1671-7554.1.2014.005

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Influence of biological rhythm on delivery mode of pregnant women receiving analgesia

BAO Ju, QU Yuan, WANG Dongxin   

  1. Department of Anesthesiology, Peking University First Hospital, Beijing 100034, China
  • Received:2014-04-24 Revised:2014-05-14 Online:2014-07-10 Published:2014-07-10

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Abstract: Objective To study the effect of biological rhythm on delivery mode. Methods In this retrospective cohort study, 2 051 nulliparas with term singleton cephalic pregnancy who were in spontaneous labor and preparing to deliver vaginally and received epidural analgesia were included. The parturients were divided into four groups according to the delivery time, i.e., morning group (7:01 to 13:00), afternoon group (13:01 to 19:00), evening group (19:01 to 1:00), and night group (1:01 to 7:00).The delivery mode and parameters were compared among the four groups. Results ①No significant differences on maternal demographic factors including age, height, weight, gestational age and pregnancy complications were found among the four groups (P>0.05). ②Significant difference was shown among the four groups in delivery mode (P<0.01).The rate of cesarean section was significantly higher in night group than in the other groups (P<0.05). ③Neonatal birth weight was higher in afternoon and evening groups than in morning and night groups. Conclusion Biological rhythm seems to influence the delivery mode,and the rate of cesarean section is the highest in evening periods.

Key words: Delivery mode, Analgesia, obstetric, Neonate, Biological rhythm, Nulliparous women

CLC Number: 

  • R714.3
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