Maternal and neonatal outcomes by labor onset type and gestational age (original) (raw)
Related papers
2020
Objective: To determine maternal and neonatal morbidity associated with induction of labor at 39 weeks compared with expectant management through 42 weeks. Design: Cohort study Setting & Population: Low risk American women who delivered between 39 and 42 weeks in 2015 to 2017. Methods: Data was abstracted from the national vital statistics database. Multivariable log-binomial regression analysis was conducted to estimate the relative risk of morbidity. Main Outcome Measures: Maternal morbidity included Triple I, blood transfusion, ICU admission, uterine rupture, cesarean hysterectomy, and cesarean delivery. Neonatal morbidity included 5 minute Apgar ≤3, prolonged ventilation, seizures, NICU admission, and neonatal death. Results: A total of 1,885,694 women were included for analysis. Women undergoing induction of labor at 39 weeks were less likely to develop Triple I (p-value < 0.001; aRR 0.66; 95% CI [0.64-0.68]) and require a cesarean section (p-value <0.01; aRR 0.69l 95% CI...
Acta Obstetricia et Gynecologica Scandinavica
Introduction. We aimed to investigate if labor onset before planned cesarean delivery (CD) affects the risk of neonatal admission, respiratory distress, or neonatal infectious morbidity. Material and methods. Our cohort included singleton term pregnant women with intended CD who delivered at Aarhus University Hospital from 1990 to 2012. Two groups of women were identified: women with intended CD performed before labor (nonlabor CD) and women with intended CD performed after spontaneous labor onset (labor-onset CD); in both groups there was no other maternal or fetal medical indication for an immediate CD or for early-term CD scheduling. Data were stratified in earlyterm (37-38 weeks) and full-term (39-40 weeks) deliveries. The main outcome measures were neonatal admission, respiratory distress and neonatal infectious morbidity. Results. Among 103 919 live births, 5071 deliveries were nonlabor CDs and 731 were labor-onset CDs. Compared to nonlabor CD, labor-onset CD was associated with similar risks of neonatal admission and respiratory distress, both at early and full term, but with a two-to threefold increased risk of newborn septicemia or antibiotic treatment at early term. Labor onset at early term was associated with a lower risk of maternal blood loss of more than 500 mL, but with a higher risk of postoperative antibiotic treatment and endometritis. Conclusions. Labor onset before planned CD was not associated with a decrease in neonatal respiratory morbidity, but may be associated with increased risks of neonatal infection.
Maternal and neonatal outcomes of elective induction of labor
Evidence report/technology assessment, 2009
Induction of labor is on the rise in the U.S., increasing from 9.5 percent in 1990 to 22.1 percent in 2004. Although, it is not entirely clear what proportion of these inductions are elective (i.e. without a medical indication), the overall rate of induction of labor is rising faster than the rate of pregnancy complications that would lead to a medically indicated induction. However, the maternal and neonatal effects of induction of labor are unclear. Many studies compare women with induction of labor to those in spontaneous labor. This is problematic, because at any point in the management of the woman with a term gestation, the clinician has the choice between induction of labor and expectant management, not spontaneous labor. Expectant management of the pregnancy involves nonintervention at any particular point in time and allowing the pregnancy to progress to a future gestational age. Thus, women undergoing expectant management may go into spontaneous labor or may require indica...
Maternal and neonatal outcome following prolonged labor induction
Obstetrics & Gynecology, 1998
To examine the effect of labor induction length on maternal and neonatal outcome. Methods: Inductions of labor were reviewed retrospectively, comparing 27 patients with infectious complications to 313 with no infections. Univariate analysis, t-test, 2 , and Fisher exact test were used for statistical analysis. Forward stepping logistic regression was used in a multivariate model to identify odds ratio (OR) and 95% confidence intervals (CI). Results: There was a statistically significant increased risk of maternal infection with increasing induction time. In univariate analysis, cesarean delivery, duration of induction, duration of oxytocin administration, nulliparity, use of internal monitors, increased maternal weight gain, and low cervical dilatation at start of induction were all associated with increased maternal infection risk. Multivariate analysis showed duration of induction for each additional 2 hours (OR 1.09; 95% CI 1.01, 1.18) and nonwhite ethnicity (OR 5.95; 95% CI 1.72, 20.49) to be associated significantly with maternal infection. Maternal infection was associated with lower Apgar scores and increased neonatal intensive care unit admissions. In patients who delivered vaginally, a logistic regression model estimated infectious morbidity at 40 hours to be 10%. The cesarean rate was not increased with prolonged induction. Conclusion: Prolonged induction is associated with a small increased risk of infectious morbidity, with an estimated 10% incidence noted after 40 hours of induction in women who deliver vaginally.
Trend in major neonatal and maternal morbidities accompanying the rise in the cesarean delivery rate
The aim of the study was to explore a cesarean delivery rate (CDR) beyond which major neonatal and maternal morbidities may outweigh the benefits of the procedure itself. A retrospective population-based cohort study was conducted at a single university teaching hospital between 1993 and 2012. Pregnant women who delivered at a gestational age of 23 weeks or more were included. Data including delivery mode, brachial plexus injury (BPI), neonatal encephalopathy (NE), placenta accreta (PA), blood transfusion (BT), and cesarean hysterectomy (CH) for each year were extracted, plotted, and trends analyzed. The Cochran-Armitage Trend Test was used to identify trends and correlations. Overall, 83,806 deliveries took place during this period. CDR increased from 10.9% to 21.7% (p < 0.001). Significant decreases in the incidence of BPI (p < 0.001) and NE (p = 0.006) were observed. At CDRs of 13.6% and 20%, there was no further significant decrease in the incidence of BPI and NE, respectively. The incidence of BT increased significantly (p < 0.001) while the increase in the incidence of PA was not significant (p = 0.06) nor the change in the incidence of CH (p = 0.4). A CDR of 20% may still confirm additional beneficial effect on major perinatal morbidities without a significant increase in the incidence of PA.
Journal of Maternal-Fetal and Neonatal Medicine, 2013
Objective: To compare infant mortality rates among women with a failed versus successful trial of labor after cesarean (TOLAC) following labor induction or stimulation. Study design: Using US linked birth and infant death cohort data (2000)(2001)(2002)(2003)(2004), we identified women who delivered non-anomalous singleton births at 34-41 weeks with TOLAC whose labors were induced or stimulated. Multivariable log-binomial regression models were fitted to estimate the association between TOLAC success and infant mortality. Results: Of the 164,113 women who underwent TOLAC, 41% were unsuccessful. After adjustment for potential confounding factors, a failed TOLAC was associated with a 1.4 fold (95% confidence interval [CI] 1.1, 1.7) increased risk of infant mortality. Conclusions: Among women undergoing labor induction or stimulation, a failed TOLAC is associated with higher likelihood of infant mortality.
Elective Delivery Before 39 Weeks: The Risk of Infant Admission to the Neonatal Intensive Care Unit
Maternal and Child Health Journal, 2012
Despite American College of Obstetricians and Gynecologists guidelines suggesting that non-urgent planned deliveries be scheduled at/after 39 weeks; elective delivery before 39 weeks occurs often in the United States. The objective of this study is to estimate the elective delivery rate between 36(0/7) and 38(6/7) weeks gestation and compare NICU admission rates between elective and non-elective deliveries. We conducted a retrospective cohort (n = 1,577) study. Charts were reviewed for all singleton deliveries (2006-2007) between 36(0/7) and 38(6/7) weeks gestation taking place at one hospital in NYS to determine delivery status. We computed adjusted relative risks (RR) with 95% confidence intervals (CI) for elective delivery in relation to NICU admission using robust Poisson regression. 32.8% of all births were elective: 20.7% of vaginal and 55.7% of cesarean births. Elective delivery increased with increasing gestational age. After controlling for potential confounders, infants born via a vaginal elective delivery (RR = 1.40, CI: 1.00, 1.94), an elective cesarean (RR = 2.05, CI: 1.53, 2.76), or a non-elective cesarean (RR = 2.00, CI: 1.50, 2.66) are at significantly increased risk of NICU admission compared to infants born via a non-elective vaginal delivery. Elective delivery before 39 weeks is common and increases the risk of infant NICU admission.
American Journal of Obstetrics and Gynecology, 2019
BACKGROUND: A low rate of primary cesarean delivery is expected to reduce some of the major complications that are associated with a repeat cesarean delivery, such as uterine rupture, adhesive placental disorders, hysterectomy, and even maternal death. Since 2014, and in alignment with the American College of Obstetricians and Gynecologists and the Society for MaternalÀFetal Medicine, we changed our approach to labor dystocia, defined as abnormal progression of labor, by allowing a longer duration of the second stage of labor. OBJECTIVE: To examine the effect of prolonging the second stage of labor on the rate of cesarean delivery, and maternal and neonatal outcomes. MATERIALS AND METHODS: In a historical control group, we compared maternal and neonatal outcomes over 2 periods. Period I (9300 patients): from May 2011 until April 2014, when a prolonged second stage in nulliparous women was considered after 3 hours with regional anesthesia or 2 hours if no such anesthesia was provided. Second-stage arrest was defined in multiparous women after 2 hours with regional anesthesia or 1 hour without it. Period II (10,531 patients): from May 2014 until April 2017, allowed nulliparous and multiparous women continuing the second stage of labor an additional 1 hour before diagnosing second-stage arrest. Singleton deliveries at or beyond 37 weeks' gestation were initially considered for eligibility. We excluded women with high-risk pregnancies and known fetal anomalies. For comparing means, we used the t test. If variables were not normally distributed, we used the MannÀWhitney test instead. For comparing proportions, we used the c 2 test with continuity correction. RESULTS: The primary cesarean delivery was decreased in nulliparous women from 23.3% (819 of 3515) in period I to 15.7% (596 of 3796) in period II (relative risk [RR], 0.67; 95% CI, 0.61À0.74), a trend that was also significant in multiparous women (10.9%, 623 of 5785, in period I vs 8.1%, 544 of 6735, in period II; RR, 0.75; 95% CI, 0.67À0.84). The rate of operative vaginal deliveries in nulliparous women was higher in period II than in period I (19.2%, 732 of 3515, vs 17.7%, 622 of 3796, P < .0001). Rates of third-and fourth-degree laceration and of shoulder dystocia were also higher in period II. The rate of arterial cord pH < 7.0 and the rate of admission to the neonatal intensive care unit were higher in period II, but the early neurological outcome was not different when comparing the 2 periods. CONCLUSION: The new policy of labor management successfully decreased primary cesarean deliveries, with a small rise in instrumental deliveries. However, it also increased the other immediate maternal and neonatal complications. A higher rate of lower umbilical artery cord pH was the most significant finding; however, the early neurological outcome did not change. It is possible that the ongoing adjustment to the new labor protocol will avoid, in the future, maternal and neonatal complications. The long-term maternal and neonatal consequences of our new approach will be evaluated in future studies.
American Journal of Obstetrics and Gynecology, 2012
OBJECTIVE-We sought to examine the association of labor induction and perinatal outcomes. STUDY DESIGN-This was a retrospective cohort study of low-risk nulliparous women with term, live births. Women who had induction at a given gestational age (eg, 39 weeks) were compared to delivery at a later gestation (eg, 40, 41, or 42 weeks). RESULTS-Compared to delivery at a later gestational age, those induced at 39 weeks had a lower risk of cesarean (adjusted odds ratio [aOR], 0.90; 95% confidence interval [CI], 0.88-0.91) and labor dystocia (aOR, 0.88; 95% CI, 0.84-0.94). Their neonates had lowered risk of having 5minute Apgar <7 (aOR, 0.81; 95% CI, 0.72-0.92), meconium aspiration syndrome (aOR, 0.30; 95% CI, 0.19-0.48), and admission to neonatal intensive care unit (aOR, 0.87; 95% CI, 0.78-0.97). Similar findings were seen for women who were induced at 40 weeks compared to delivery later. CONCLUSION-Induction of labor in low-risk women at term is not associated with increased risk of cesarean delivery compared to delivery later. Keywords cesarean; induction; neonatal outcomes Induction of labor is among the most common obstetric interventions. In 2008, 23.1 per 100 (23.1%) live births in the United States had labor induction, 1 and this represents more than a doubling of the frequency in the 1990s. 2 The goal of induction of labor is to achieve a vaginal delivery when the benefits of expeditious delivery outweigh the potential risk of