///2019 Abstract Details
2019 Abstract Details2019-07-13T07:45:15-05:00

Cesarean Delivery Interval Duration and Its Impact on Maternal and Neonatal Outcomes: A Retrospective Cohort Study

Abstract Number: F3D-562
Abstract Type: Original Research

Jie Zhou MD, MS, MBA, FASA1 ; Yao Zhang MD2; Li Zhuan MD, PhD3


There are estimated six hundred and fifty thousand repeat cesarean deliveries (CD) per year in the United States, which accounts for almost 15% of all annual deliveries. It has been well established that repeat cesarean may increase unavoidable maternal risks regarding to uterine rupture and abnormal placental plantation. We hypothesize that the interval duration between CDs could have an impact to maternal and birth outcomes. The objective of this study was to evaluate the association between CD interval duration (CDID) and maternal and perinatal outcomes.


We selected a cohort of full-term parturients who had repeat CD after primary CD in Partner HealthCare System from May 2015 to January 2019. Parturients’ demographical and characteristics data of repeat CD were reviewed and analyzed from case files of patients ( Table 1).


One hundred and ninety-nine parturients were included and divided into four groups according to the CDID between two CDs (12-18 months, 18-24 months, 24-30 months, >30 months) (Table 1). The priority of CDs and neonatal birth weights were significantly different between the four groups. The anesthesia type, estimated blood loss, operative time, and Apgar scores showed no difference between the four groups. Postoperative maximum pain in four groups showed an upward trend in 20 hours after CD (Figure 1). We are conducting more data analysis on this project.


Our data indicated that long CDID (>24 months) was associated with increased risk of emergent CD and low birth weight of neonates. However, we suspected that CDID alone might not be an independent risk factor for maternal and perinatal outcomes. We would like to bring this new concept of CDID to the attentions of clinical practitioners of obstetrics and anesthesia.


1. Hanley GE, et al. 2017

2. Mburia-Mwalili A, et al. 2015

SOAP 2019