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Updated: Oct 21, 2025

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Published on: January 7, 2018
Association between time of delivery and composite adverse outcomes in pregnancies complicated by hypertensive
Stephen M Wagner1, Han-Yang Chen2, Megha Gupta3
1Department of Obstetrics and Gynecology, Alpert Medical School, Brown University, Providence, RI, USA.
Introduction:
A potential manner to lower the morbidity with the hypertensive disoreders of pregancy is to explore the time of day of delivery.
Objective:
To compare composite neonatal adverse outcomes among term women with hypertensive disorders.
Methods:
This population-based cohort study used the U.S. vital statistics dataset from 2013 to 2017. Time of delivery was categorized into three shifts. The primary outcome was composite neonatal adverse outcome..
Results:
Compared to neonates delivered at the first shift, the risk of composite neonatal adverse outcome was higher at the third shift (aRR = 1.19, 95% CI = 1.13-1.25).
Conclusion:
the risk of composite neonatal adverse outcome is higher if the delivery occurs at the third (23:00-7:00) shift.
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