When Should the Labor Induction be Started For Late-term Pregnancies, in the Morning or in the Evening?

Creative Commons License

Kokanali M. K., Cavkaytar S., Topcu H. O., Guzel A. I., Erkilinc S., Tasci Y.

JOURNAL OF CLINICAL AND ANALYTICAL MEDICINE, vol.7, no.2, pp.176-179, 2016 (ESCI) identifier identifier identifier

  • Publication Type: Article / Article
  • Volume: 7 Issue: 2
  • Publication Date: 2016
  • Doi Number: 10.4328/jcam.2663
  • Journal Indexes: Emerging Sources Citation Index (ESCI), Scopus, TR DİZİN (ULAKBİM)
  • Page Numbers: pp.176-179
  • Kütahya Health Sciences University Affiliated: No


Aim: We aimed to investigate the labor outcomes of late-term pregnancies underwent intravenous oxytocin induction starting in the morning compared with starting in the evening. Material and Method: 266 women with a singleton pregnancy in cephalic presentation, at gestational age of 41 0/7 through 41 6/7 weeks were enrolled in this retrospective study. Labor inductions with intravenous oxytocin were started in the morning hours (08.00-12.00) or in the evening hours (16.00-20.00). Labor outcomes and night-time (20.00-08.00) deliveries were recorded. Results: In primiparae group, labor duration and active phase length of labor were significantly shorter in the evening group than in the morning group. In multiparae women, the ratio of night-time delivery was significantly higher in evening group as compared to morning group. And also night-time delivery was found as a significant risk factor for neonatal intensive care unit admission. Discussion: Induction of labour with intravenous oxytocin starting in the evening shortens labor duration in primiparae women, but not in multiparae women. Night-time delivery may be a risk for poor perinatal outcome. As the labor induction is planned, parity, start time of induction and estimated delivery time should be taken into account to reduce the risk of poor neonatal outcome in late-term pregnancies.