Abstract
Objective
To determine if there is a difference in the maternal and perinatal characteristics and outcomes of women undergoing a medically indicated labor induction and delivering vaginally compared to women in spontaneous labor delivering vaginally.
Methods
This is a planned secondary analysis of previously published data with additional data collected for a case-control design. Maternal and perinatal characteristics and outcomes of women undergoing a medically indicated labor induction of labor and delivering vaginally were compared with the next woman who went into labor spontaneously and delivered vaginally.
Results
There were 1097 women in the medically indicated labor group and 1096 women in the spontaneous labor group. The medically indicated induction group was younger (p < .0001), had less women of “other” race (p = .004), were of a lower gravidity and parity (p < .0001), had a lower Bishops’ score on admission (p < .0001), had a greater proportion of umbilical arterial cord pH values <7.1 and <7.0 (p < .0001). Additionally, the induction group had longer first and second stages of labor (p < .0001). While the unadjusted rates of post-partum complications and NICU admission were higher in the medically indicated labor induction group, only cord gas pH <7.1 remained statistically significant after adjustment.
Conclusion
Even with successful vaginal delivery of a medically indicated induction of labor, the risk for adverse outcomes remains elevated.
Acknowledgments
We would like to thank Donna Eastham, BA, CRS for her help in editing this manuscript.
Disclosure statement
The authors have no financial disclosures or conflicts of interest and no funding was used for this research.