Retrospective study of outcome on vaginal and abdominal delivery in twin pregnancy in which twin 1 is presenting by the breech

First Twin in Breech Presentation and Neonatal Mortality and Morbidity According to Planned Mode of Delivery

OBJECTIVE

To compare neonatal mortality and morbidity of first twins according to the planned mode of delivery when the first twin is in breech presentation, in a country where planned vaginal delivery is an option.

METHODS

This is a planned secondary analysis of the JUMODA (JUmeaux MODe d'Accouchement) cohort, a national prospective population-based study of twin deliveries conducted in 176 French hospitals. We analyzed pregnancies with first twins in breech presentation and applied the inclusion criteria of the Twin Birth Study (except the criterion for first-twin presentation): both fetuses alive, with a birth weight between 1,500 g and 4,000 g, at or after 32 0/7 weeks of gestation. The primary outcome was a composite of neonatal mortality and morbidity. We used multivariate Poisson regression models to control for potential confounders and propensity score analyses, that is, matching and inverse probability of treatment weighting to control for indication bias.

RESULTS

Among the 1,467 women with a breech-presenting first twin included in this analysis, 1,169 (79.7%) had planned cesarean and 298 (20.3%) planned vaginal births, of whom 185 (62.1%) delivered both twins vaginally. The neonatal mortality and severe morbidity rate for first twins was 1.7% (5/298) in the planned vaginal and 1.9% (22/1,169) in the planned cesarean delivery groups (crude relative risk [RR] 0.90, 95% CI 0.34-2.34). Planned vaginal delivery was not associated with higher neonatal mortality and morbidity than planned cesarean delivery, regardless of the statistical method used: adjusted RR 0.71, 95% CI 0.27-1.86; RR 0.61, 95% CI 0.20-1.83 after matching for propensity score; RR 0.63, 95% CI 0.23-1.74 with inverse probability of treatment weighting. Analyses of neonatal mortality and morbidity of second twins yielded similar results.

CONCLUSION

Although our sample size precluded a robust assessment for small differences in outcomes between planned cesarean and planned vaginal delivery in twin pregnancies in which the first twin was in breech presentation, in our cohort planned vaginal delivery was not associated with higher neonatal mortality and morbidity for either twin.

Mode of delivery in non-cephalic presenting twins: a systematic review

Purpose

This systematic review aims to determine if there are evidence-based recommendations for the optimal mode of delivery for non-cephalic presenting first- and/or second twins. We investigated the impact of the mode of delivery on neonatal outcome for twin deliveries with (1) the first twin (twin A) in non-cephalic presentation, (2) the second (twin B) in non-cephalic presentation and (3) both twins in non-cephalic presentation.

Methods

A computer-aided search of Medline, Embase, Cinahl and Cochrane databases was carried out and quality of the studies was assessed with the Cochrane Collaboration’s tool for assessing risk of bias and the GRADE approach.

Results

One high-quality clinical trial (60 twin pairs) and 16 moderate/low-quality observational studies (3,167 twin pairs) showed no difference in neonatal outcome between vaginal and caesarean delivery in twin A and/or B.

Conclusion

Our results do not suggest benefit of caesarean over vaginal delivery for selected twin gestations with twin A and/or twin B in non-cephalic presentation. However, no final conclusion can be drawn due to the small sample sizes and statistic limitations of the included studies. Randomized studies with sufficient power are required to make a strong recommendation.

Neonatal Outcome of Second Twins Depending on Presentation and Mode of Delivery

Our objective was to examine the neonatal outcome of second twins depending on presentation and mode of delivery. Using a database we analyzed the short-term neonatal outcome in twin pregnancies offered a trial of labor with special emphasis on the second twin depending on presentation and mode of delivery. Neonatal outcome was evaluated by Apgar scores, umbilical cord blood pH values, and perinatal or neonatal morbidity and mortality. Overall, in 219 (78%) of 281 pregnancies successful vaginal birth (VB) of both twins (VB–VB) was possible, 48 (17%) women had to be delivered by cesarean section (CS) of both twins (CS–CS), and in 14 (5%) women the second twin had to be delivered by CS after VB of the first twin (VB–CS). Successful VB was most common for vertex-vertex (V/V; n = 171, 82%) and vertex-nonvertex (n = 48, 75%) presentation (V/NV). Twins delivered by VB–CS had the lowest values for pHart (p = .006) and pHven (p = .010). pHart less than or equal to 7.00 values occurred only in second twins delivered VB–VB or VB–CS. Lower Apgar scores of the second twin occurred more frequently in the VB–CS and in the VB–VB than in the CS–CS groups (ps < .05). Lower levels of pHart (p = .002) and frequency of pHart less than or equal to 7.00 occurred more often in nonvertex second twins than in vertex second twins (p < .022). The high CS rate in V/NV presentation and the significantly worse perinatal short-term outcome of NV second twins after VB of the first twin underline that randomized studies are necessary to evaluate the best delivery mode for V/NV twins.

Cesarean delivery for twins: a systematic review and meta-analysis

OBJECTIVE

We undertook a systematic review and meta-analysis to determine whether a policy of planned cesarean section or vaginal delivery is better for twins.

STUDY DESIGN

We searched MEDLINE and EMBASE from 1980 through May 2001 using combinations of the following terms: twin, delivery, cesarean section, vaginal birth, birth weight, and gestational age. Studies that compared planned cesarean section to planned vaginal birth for babies weighing at least 1500 g or reaching at least 32 weeks' gestation were included. We computed pooled odds ratios for perinatal or neonatal mortality, low 5-minute Apgar score, neonatal morbidity, and maternal morbidity. The infant was the unit of statistical analysis. Results were considered statistically significant if the 95% CI did not encompass 1.0.

RESULTS

We retrieved 67 articles, 63 of which were excluded. Four studies with a total of 1932 infants were included in the analysis. A low 5-minute Apgar score occurred less frequently in twins delivered by planned cesarean section (odds ratio, 0.47; 95% CI, 0.26-0.88) principally because of a reduction among twins if twin A was in breech position (odds ratio, 0.33; 95% CI, 0.17-0.65). Twins delivered by planned cesarean section spent significantly longer in the hospital (mean difference, 4.01 days; 95% CI, 0.73-7.28 days). There were no significant differences in perinatal or neonatal mortality, neonatal morbidity, or maternal morbidity.

CONCLUSION

Planned cesarean section may decrease the risk of a low 5-minute Apgar score, particularly if twin A is breech. Otherwise, there is no evidence to support planned cesarean section for twins.