A cohort study of maternal and neonatal morbidity in relation to use of sequential instruments at operative vaginal delivery

Objective

To evaluate the risk factors and maternal and neonatal morbidity associated with sequential use of instruments (vacuum and forceps) at operative vaginal delivery.

Study design

A cohort study of 1360 nulliparous women delivered by a single instrument (vacuum or forceps) or by both instruments, within two university teaching hospitals in Scotland and England. Outcomes were compared for use of sequential instruments versus use of any single instrument. A sub-group analysis compared sequential instruments versus forceps alone. Outcomes of interest included anal sphincter tears, postpartum haemorrhage, urinary retention, urinary incontinence, prolonged hospital admission, neonatal trauma, low Apgar scores, abnormal cord bloods and admission to the neonatal intensive care unit (NICU).

Results

Use of sequential instruments at operative vaginal delivery was associated with fetal malpositions, Odds Ratio (OR) 1.8 (95% Confidence Interval (CI) 1.3-2.6), and large neonatal head circumference (>37 cm) (OR 5.0, 95% CI 2.6-9.7) but not with maternal obesity or grade of operator. Sequential use of instruments was associated with greater maternal and neonatal morbidity than single instrument use (anal sphincter tear 17.4% versus 8.4%, adjusted OR 2.1, 95% CI 1.2-3.3; umbilical artery pH <7.10, 13.8% versus 5.0%, adjusted OR 3.3, 95% CI 1.7-6.2). Sequential instrument use had greater morbidity than single instrument use with forceps alone (anal sphincter tear OR 1.8, 95% CI 1.1-2.9; umbilical artery pH <7.10 OR 3.0, 95% CI 1.7-5.5).

Conclusions

The use of sequential instruments significantly increases maternal and neonatal morbidity. Obstetricians need training in the appropriate selection and use of instruments with the aim of completing delivery safely with one instrument.     

Characteristics of obstetric intensive care unit admissions in New Jersey

Objective.?To assess the demographic characteristics, risk factors and perinatal outcomes among maternal intensive care unit (ICU) admissions in New Jersey from 1997 to 2005.

Methods.?Data were obtained from a perinatal linked database from MCH epidemiology programme in New Jersey. Chi-square test was used for bivariate analysis and stepwise logistic regression was used to assess the influence of the potential risk factors and pregnancy complications.

Results.?There were 15 447 (1.54%) ICU admissions and 23 maternal deaths (0.15%) among the 1 004 116 pregnancies. Analysis of demographic factors revealed that maternal age, race and smoking were significantly associated with ICU admission. Regression analysis adjusting for maternal age, parity, gravida, race, smoking status, maternal education and place of delivery found the following predictors for ICU admission, preeclampsia (odds ratio (OR): 2.8, 95% confidence interval (CI): 2.6–3.0), eclampsia (OR: 6.8, 95% CI: 5.4–8.6), placenta previa (OR: 3.0, 95% CI: 2.7–3.4), abruption (OR: 8.9, 95% CI: 8.3–9.6), multifetal pregnancy (OR: 4.2, 95% CI: 4.1–4.4), diabetes (OR: 3.1, 95% CI: 2.7–3.5), acute renal failure (OR: 22.1, 95% CI: 13.3–36.6) and cesarean delivery (OR: 1.9, 95% CI: 1.5–2.4). Infants born to ICU admitted mothers had higher rates of NICU admission, neonatal intubations and lower Apgar scores compared with infants born to non-ICU admitted mothers.

Conclusion.?Pregnancy complications are predictive of ICU admission amongst pregnant patients after adjusting for demographic factors.     

To ignore or not to ignore placental calcifications on prenatal ultrasound: a systematic review and meta-analysis

Objective: The human placenta is known to calcify with advancing gestational age, and, in fact, the presence of significant calcifications is one of the components of grade III placenta, typical of late gestation. As such, the presence of significant placental calcifications often prompts obstetric providers to expedite delivery. This practice has been attributed, in part, to the presumed association between grade III placenta and adverse pregnancy outcomes. Such approach, however, can be the source of major anxiety and may lead to unnecessary induction of labor, with its associated predisposition to cesarean delivery as well as a myriad of maternal and neonatal morbidities. The objective of this study was to examine the association between grade III placental calcifications and pregnancy outcomes.

Materials and methods: A systematic review of the literature was performed for studies evaluating the association between grade III placenta and a number of pregnancy outcomes, including labor induction, fetal distress (abnormal fetal heart tracing), low Apgar score (less than 7 at 5?min), need for neonatal resuscitation, admission to the Neonatal Intensive Care Unit, perinatal death, meconium liquor, and low birth weight.

Results: There was a five-fold increase in risk of labor induction with the presence of grade III placenta (OR 5.41; 95% CI 2.98–9.82). There was no association between grade III placenta and the incidence of abnormal fetal heart tracing (OR 1.62; 95% CI 0.94–2.78), low Apgar score of less than 7 at 5?min (OR 1.68; 95% CI 0.84–3.36), need for neonatal resuscitation (OR 1.08; 95% CI 0.67–1.75), and admission to the Neonatal Intensive Care Unit (OR 0.90; 95% CI 0.21–3.74). In turn, the incidence of meconium liquor was higher in the setting of grade III placentae (OR 1.68; 95% CI 1.17–2.39). Similarly, a positive association between grade III placental calcifications and low birth weight (OR 1.63; 95% CI 1.19–2.22) and perinatal death (OR 7.41; 95% CI 4.94–11.09) was identified.

Conclusion: The study alerts us to a significant association between grade 3 placental calcifications and labor induction, although it demonstrates that these sonographic findings do not appear to predispose to fetal distress, low Apgar score, need for neonatal resuscitation, or admission to the NICU.     

Safety of vaginal delivery in very low birthweight vertex singletons: a meta-analysis

Objective: The objective of this study is to assess the safety of vaginal delivery in VLBW singletons in the vertex presentation.

Methods: MEDLINE, EMBASE, Cochrane Central Register of Controlled Trials, and Web of Science databases were searched for studies on mode of delivery and neonatal outcome in VLBW singletons in the vertex presentation. A total of 28 studies met our inclusion criteria.

Results: Vaginal delivery was not associated with an increase in overall neonatal mortality compared with cesarean delivery (OR 0.87, 95% CI 0.72–1.04). Vaginal delivery was associated with a significant decrease in mortality for the 1250–1500?g birthweight category (OR 0.57, 95% CI 0.36–0.92), while an increase in mortality in the 500–750?g category was not significant (OR 1.5, 95% CI 0.86–2.61). Severe intraventricular hemorrhage (IVH) was not associated with mode of delivery (OR 1.05, 95% CI 0.85–1.29), but the only two high quality study that assessed IVH of all grades found an increase in risk for IVH in vaginal delivery (OR 1.33, 95% CI 1.16–1.51).

Conclusions: Vaginal delivery does not appear to increase the risk for neonatal mortality. However, current available data on neonatal morbidity are limited. More high-quality studies are needed to assess the association between mode of delivery and neonatal morbidity.     

Abnormal vaginal colonization by gram-negative bacteria is significantly higher in pregnancy conceived through infertility treatment compared to natural pregnancy

Objective: To compare abnormal vaginal colonization between natural pregnancy and pregnancy by infertility treatment in high-risk parturient women and to examine the association between abnormal vaginal colonization and early-onset neonatal sepsis (EONS).

Methods: The clinical characteristics, vaginal culture result, and delivery outcome of patients who admitted to our high-risk unit between 2005 and 2014 were retrospectively reviewed and compared. We investigated the prevalence of EONS according to maternal vaginal colonization and examined the concordance between maternal vaginal bacteria and etiologic microorganism causing EONS.

Results: Among 1096 pregnancies, the rate of vaginal colonization by gram-negative bacteria, especially Escherichia coli was significantly higher in pregnancies by infertility treatment after adjustment of confounding variables (E. coli, OR [95% CI]: 2.47 [1.33–4.57], p?=?0.004). The rate of EONS was significantly higher in neonates with maternal abnormal vaginal bacteria colonization (OR [95% CI]: 3.38 [1.44–7.93], p?=?0.005) after adjusting for confounding variables. Notably, among microorganisms isolated from maternal vagina, E. coli and Staphylococcus aureus were consistent with the results from neonatal blood culture in EONS.

Conclusions: Our data implicate a possible association between gram-negative bacteria colonization and infertility treatment and suggest that maternal vaginal colonization may be associated with EONS of neonates in high-risk pregnancy.     

An elevated maternal serum C-reactive protein in the context of intra-amniotic inflammation is an indicator that the development of amnionitis,an intense fetal and AF inflammatory response are likely in patients with preterm labor: clinical implications

Abstracts

Objective: We propose that an elevated maternal serum C-reactive protein (CRP) concentration in the context of intra-amniotic inflammation (IAI) is a predictor for amnionitis development, known to be the most advanced stage of maternal inflammatory response during the progression of acute histologic chorioamnionitis in preterm gestations.

Methods: Study population consisted of 53 singleton gestations with IAI, who underwent amniocentesis due to preterm labor and intact membranes (PTL) and delivered preterm-neonates (<34.5 weeks) within 5?days of amniocentesis. The frequency of amnionitis and the intensity of fetal and amniotic fluid (AF) inflammatory response were examined according to the presence or absence of an elevated maternal serum CRP (≥0.7?mg/dL) at the time of amniocentesis. IAI was defined as an elevated AF matrix metalloproteinase-8 (MMP-8) (≥23?ng/mL), and fetal inflammatory response syndrome (FIRS) defined as an elevated umbilical cord plasma CRP (≥200?ng/mL).

Results: (1) Patients (73.6%, 39/53) with an elevated maternal serum CRP had a significantly higher rate of amnionitis (59.0% versus 7.1%; p?<?0.005), but not funisitis (46.2% versus 28.6%; p?>?0.05), and higher median AF MMP-8 and umbilical cord plasma CRP concentration at birth than patients (26.4%,14/53) without that (AF MMP-8 (ng/mL): 373.1 versus 138.6: p?=?0.05; umbilical cord plasma CRP (ng/mL): 363.4 versus 15.5: p?<?0.05); (2) Multiple logistic regression analysis demonstrated that an elevated maternal serum CRP was a better independent predictor of amnionitis (odds ratio (OR), 12.5: 95% confidence interval (CI), 1.1–141.0; p?<?0.05) than FIRS (OR, 3.6: 95% CI, 0.6–20.2; p?=?0.150) and any other AF tests.

Conclusions: An elevated maternal serum CRP concentration in the context of IAI is an indicator that the development of amnionitis, an intense fetal and AF inflammatory response are likely in patients with PTL.     

The effect of gestational age on neonatal outcome in low-risk singleton term deliveries

Objective: To assess the association between gestational age at delivery and adverse neonatal outcome among term low-risk singleton neonates.

Methods: A retrospective cohort study design was used. The study group included all low-risk singleton term (37?+?0 to 41?+?6 weeks) newborns delivered in a single tertiary university-affiliated medical center over a 5-year period. Outcome of neonates delivered at 37?+?0 to 37?+?6 weeks of gestation (early term) and 41?+?0 to 41?+?6 weeks of gestation (late term) was compared to that of neonates delivered at 39?+?0–39?+?6 weeks of gestation (control).

Results: Overall, the outcome of 30?229 neonates was analyzed. The incidence of neonatal mortality was 1.0 per 1000 live-born neonates, with no significant difference between the various gestational age groups. Early term newborns were at higher risk for respiratory morbidity, hypoglycemia, hypocalcemia, thrombocytopenia and unexplained jaundice, and had higher rates of prolonged hospital stay, NICU admission, sepsis workup and antibiotic treatment. On multivariate analysis, early term delivery was an independent predictor for composite respiratory morbidity (OR=2.4, 95% CI 1.6–3.8, p?p?p?p?Conclusion: Even in low-risk singleton deliveries, early term is associated with an increased risk of neonatal morbidity.     

Automated auditory brainstem response in preterm newborns with histological chorioamnionitis

Objective: We investigated whether histological chorioamnionitis is associated with an adverse neonatal hearing outcome.

Methods: Two cohorts of very preterm newborns (n?=?548, gestational age ≤ 32.0 weeks) were linked to placental histology and automated auditory brainstem response (AABR) outcome.

Results: In multivariable analyses, an abnormal AABR was not predicted by the presence of histological chorioamnionitis, either with or without fetal involvement (OR 1.4, 95% CI 0.5 – 3.8, p?=?0.54 and OR 1.1, 95% CI 0.4–3.0, p?=?0.79, respectively). Significant predictors of abnormal AABR included, e.g. birth weight (per kg increase: OR 0.2, 95% CI 0.0–0.6, p?=?0.006), umbilical cord artery pH (per 0.1 increase: OR 0.7, 95% CI 0.5–0.9, p?=?0.005) and mechanical ventilation (OR 3.7, 95% CI 1.2–11.6, p?=?0.03).

Conclusions: Histological chorioamnionitis was not associated with an adverse neonatal hearing outcome in two cohorts of very preterm newborns. Indicators of a complicated neonatal clinical course were the most important predictors of an abnormal hearing screening.     

Obstetric outcomes in pregnant women with diabetes versus hypertensive disorders versus both

Abstract

Objective.?To compare obstetrical outcomes in pregnant women with diabetes versus hypertensive disorders versus both.

Methods.?One million patients in the New Jersey Database were analyzed. Of which 6.91% had hypertension, 4.79% had diabetes, and 0.91% had both. Information was derived from a perinatal linked data-set provided by the Maternal Child Health Epidemiology (MCH Epi) Program in the New Jersey Department of Health and Senior Services. Linking of electronic birth certificates, hospital discharge records for mother and newborn, and infant death certificates for all infants born in New Jersey between the years 1997 and 2005 created the data-set.

Results.?Coexistence of hypertension and diabetes increased with advancing maternal age (OR 3.41; CI 3.12–3.72). Among ethnic groups, diabetes was more common in Asians (OR 2.92; CI 2.84–3.00), while hypertension was more common in Blacks (OR 1.49; CI 1.46–1.53). Blacks followed by Asians had a higher risk of being in the combined category. Induction of labor (OR 4.16; CI 3.96–4.38), shoulder dystocia (OR 2.56; CI 2.05–3.19), operative vaginal delivery (OR 3.92; CI 3.29–4.66), cesarean deliveries with no trial of labor (OR 2.54; CI 2.40–2.69) as well as with failed trial of labor (OR 4.09; CI 3.88–4.31) were more common in the combined group. Neonatal outcomes were poor in the combined category, with high rate of preterm deliveries, neonatal intensive care unit (NICU) admissions (OR 2.14; CI 2.01–2.28), neonatal seizures (OR 2.30; CI 1.31–4.04), low 5-min APGAR scores (OR 1.78; CI 1.57-2.01), and longer NICU stay (OR 2.30; CI 2.15-2.47).

Conclusions.?Coexistence of hypertension and diabetes was associated with worse obstetric and neonatal outcomes than either alone. This should be emphasized to mothers during prenatal counseling. Further research should focus on interventions to improve morbidity in the combined category.     

Pregnancy outcomes in women aged 35 years or older with gestational diabetes – a registry-based study in Finland

Objective: To compare pregnancy outcomes of women ≥35 years to women <35 years with and without gestational diabetes.

Methods: The data include 230?003 women <35 years and 53?321 women ≥35 years and their newborns from 2004 to 2008. In multivariate modeling, the main outcome measures were preterm delivery (<28, 28–31 and 32–36 weeks' gestation), Apgar scores <7 at 5?min, small for gestational age (SGA), fetal death, asphyxia, preeclampsia, admission to neonatal intensive care unit (NICU), shoulder dystocia and large for gestational age (LGA).

Results: In comparison to women <35 with normal glucose tolerance, preeclampsia (OR 1.57, CI 1.30–1.88), admission to the NICU (OR 3.30, CI 2.94–3.69) and shoulder dystocia (OR 2.12, CI 1.05–4.30) were highest in insulin-treated women ≥35 years. In women ≥35, diet- and insulin-treated gestational diabetes mellitus (GDM) increased the rates of preeclampsia, shoulder dystocia and admission to NICU (OR 3.07 CI 2.73–3.45). The effect of advanced maternal age was observed in very preterm delivery (<28 weeks), fetal death, preeclampsia and NICU. The increase in preeclampsia was statistically significant.

Conclusions: GDM at advanced age is a high risk state and, more specifically, the risk caused by age and GDM appear to be increasing in preeclampsia.     

Possible role of asymmetric dimethylarginine (ADMA) in prediction of perinatal outcome in preeclampsia and fetal growth retardation related to preeclampsia

Objective: The objective of this study is to investigate maternal serum and neonatal umbilical cord asymmetric dimethylarginine (ADMA) levels in prediction of perinatal prognosis in pregnancies with preeclampsia (PE) and fetal intrauterine growth retardation (IUGR) accompanying PE (PE?+?IUGR).

Methods: Maternal serum ADMA (msADMA) and neonatal umbilical cord ADMA (ucADMA) levels were studied from 34 patients with PE, 25 patients with PE?+?IUGR, and 30 healthy pregnant controls in this prospective case–control study. Umbilical artery Doppler indices of fetuses, birth weights, Apgar scores, umbilical artery pH measurements of neonates, and admissions to neonatal intensive care unit (NICU) were recorded.

Results: Median msADMA was significantly higher in PE and PE?+?IUGR groups (p?=?0.024 and p?=?0.011, respectively), and ucADMA was significantly higher in PE and PE?+?IUGR groups than the control group (p?=?0.029 and p?=?0.018, respectively). Median msADMA and ucADMA levels were significantly higher in the PE?+?IUGR group than the PE group (p?=?0.019 and 0.021, respectively). ucADMA levels did not correlate with fetal umbilical arterial blood flow neither in the PE nor in the PE?+?IUGR group (p?=?0.518 and p?=?0.892, respectively). None was related with neonatal umbilical artery pH or NICU admission rates.

Conclusions: msADMA and ucADMA correlated with severity of PE. msADMA and ucADMA failed to predict perinatal outcome in patients with PE and PE?+?IUGR.     

Umbilical artery Doppler in relation to placental pathology and FV Leiden in pregnant women and their offspring

Abstract

Objective: Abnormal umbilical artery blood flow has been implicated in pregnancy complications and fetal demise. Its relation to histopathological changes in the placenta and to maternal or fetal thrombophilia is less well understood. The aim of this study was to evaluate the relation between umbilical artery Doppler findings, placental histopathology, and maternal and fetal coagulation factor V Leiden (FVL) status.

Methods: Two previous studies on FVL in pregnancy made the placentas of 25 women with maternal FVL carriership and 43 randomly selected non-carriers available for a histopathological examination. Umbilical artery Doppler velocimetry was performed on 54 women in late pregnancy.

Results: Abnormal umbilical artery Doppler velocimetry was associated with an approximately sevenfold increased risk of fetoplacental thrombotic vasculopathy (odds ratio [OR]: 7.5, 95% confidence intervals [CI]: 1.3–44.3), ischemic lesions (OR: 7.5, 95% CI: 1.2–46.1) and fetal carriership of FVL (OR: 8.2, 95% CI: 1.5–43.5), but not maternal FVL. Fetal FVL carriership was also associated with a sevenfold increased risk of ischemic lesions (OR: 6.7, 95% CI: 1.3–35).

Conclusions: Our results indicate that the fetal – not the maternal – FVL carriership matters regarding the umbilical artery blood flow and placental pathology, which might explain some of the heterogeneity of studies.     

Early discharge revisited: problems encountered with the home visit follow-up after the liberalization of eligibility criteria

Objective.?To compare maternal and neonatal outcomes among grandmultiparous women to those of multiparous women 30 years or older.

Methods.?A database of the vast majority of maternal and newborn hospital discharge records linked to birth/death certificates was queried to obtain information on all multiparous women with a singleton delivery in the state of California from January 1, 1997 through December 31, 1998. Maternal and neonatal pregnancy outcomes of grandmultiparous women were compared to multiparous women who were 30 years or older at the time of their last birth.

Results.?The study population included 25,512 grandmultiparous and 265,060 multiparous women 30 years or older as controls. Grandmultiparous women were predominantly Hispanic (56%). After controlling for potential confounding factors, grandmultiparous women were at significantly higher risk for abruptio placentae (odds ratio OR: 1.3; 95% confidence intervals CI: 1.2–1.5), preterm delivery (OR: 1.3; 95% CI: 1.2–1.4), fetal macrosomia (OR: 1.5; 95% CI: 1.4–1.6), neonatal death (OR: 1.5; 95% CI: 1.3–1.8), postpartum hemorrhage (OR: 1.2; 95% CI: 1.1–1.3) and blood transfusion (OR: 1.5; 95% CI: 1.3–1.8).

Conclusion.?Grandmultiparous women had increased maternal and neonatal morbidity, and neonatal mortality even after controlling for confounders, suggesting a need for closer observation than regular multiparous patients during labor and delivery.     

Obstetrical correlates and perinatal consequences of neonatal hypoglycemia in term infants

Objective: To determine independent perinatal and intrapartum factors associated with neonatal hypoglycemia.

Method: Of singleton pregnancies delivered at term in 2013; 318 (3.8%) neonates diagnosed with hypoglycemia were compared to 7955 (96.2%) neonate controls with regression analysis.

Results: Regression analysis showed that independent prenatal factors were multiparity (odds-ratio [OR]?=?1.61), gestational age (OR?=?0.68), gestational diabetes (OR?=?0.22), macrosomia (OR?=?4.87), small for gestational age neonate [SGA] (OR?=?6.83) and admission cervical dilation (OR?=?0.79). For intrapartum factors, only cesarean section (OR?=?1.57) and last cervical dilation (OR?=?0.92) were independently significantly associated with neonatal hypoglycemia. For biologically plausible risk factors, independent factors were cesarean section (OR?=?4.18), gentamycin/clindamycin in labor (OR?=?5.35), gestational age (OR?=?0.59) and macrosomia (OR?=?5.62).

Mothers of babies with neonatal hypoglycemia had more blood loss and longer hospital stays, while neonates with hypoglycemia had worse umbilical cord gases, more neonatal hypoxic conditions, neonatal morbidities and NICU admissions.

Conclusion: Diabetes was protective of neonatal hypoglycemia, which may be explained by optimum maternal glucose management; nevertheless macrosomia was independently predictive of neonatal hypoglycemia. Cesarean section and decreasing gestational age were the most consistent independent risk factors followed by treatment for chorioamnionitis and SGA. Further studies to evaluate these observations and develop preventive strategies are warranted.     

Birth trauma – risk factors and short-term neonatal outcome

Abstract

Objective: The ability to predict birth trauma (BT) based on the currently recognized risk factors is limited and there is little information regarding the short-term neonatal outcome following BT. We aimed to identify risk factors for BT and to evaluate the effect of BT on short-term neonatal outcome.

Methods: A retrospective, cohort, case–control study of all cases of BT in a single tertiary center (1986–2009). The control group included the two subsequent full-term singleton neonates who did not experienced BT. Short-term neonatal outcome was compared between the groups including Apgar scores, NICU admission, duration of hospitalization and neurologic, respiratory and metabolic morbidity.

Results: Of the 118?280 singleton full-term newborns delivered during the study period, 2874 were diagnosed with BT (24.3/1000). The most frequent types of BT were scalp injuries (63.9%, 15.5/1000) and clavicular fracture (32.1%, 7.7/1000). The following factors were found to be independent risk factors for BT: instrumental delivery (OR 7.5, 95% CI 6.3–8.9), birth weight, delivery during risk hours, parity, maternal age and neonatal head circumference. Cesarean delivery was the only factor protective of BT (OR 0.2, 95% CI 0.2–0.3). Neonates in the study group had a prolonged length of hospital stay (3.3 versus 2.7?d, p?=?0.001), were more likely to be admitted to the NICU (3.9% versus 1.9%, p?<?0.001), and had a higher rate of jaundice (11.9% versus 7.1%, p?<?0.001) and neurological morbidity (4.7% versus 2.3%, p?<?0.001).

Conclusion: Instrumental delivery appears to be responsible for most cases of neonatal BT.     

Neonatal outcomes following elective caesarean delivery at term: a hospital-based cohort study

Objective: To assess neonatal outcomes following elective caesarean delivery (CD) at term (≥37?+?0 weeks gestation).

Methods: A retrospective cohort study was conducted in a single Irish maternity hospital. Elective CDs at term between August 2008 and July 2012 were reviewed. Outcome measures were admission to the neonatal intensive care unit (NICU), length of stay, respiratory complications, hypoglycaemia, jaundice, newborn sepsis and medical interventions.

Results: A total of 4242 women had an elective CD at term, accounting for approximately 15% of all term deliveries. Admission rate to the NICU at 37 weeks gestation was 21.8% versus 10% at 39 weeks (p for trend <0.0001). Similar trends of decreasing risk with later gestational age were noted for the other outcomes. An increased odds of admission to the NICU at 37 weeks [adjusted odds ratio (OR) 2.48 (95% CI 1.28, 4.79)] and at 38 weeks [OR 1.34, 95% CI 1.02, 1.77] compared to the reference of 39 weeks gestation was found.

Conclusions: This study supports evidence that, with regard to neonatal outcome, 39 weeks gestational age is the optimal delivery time. Heightened awareness of the increased risk of neonatal morbidity, when delivery is performed electively before 39 weeks, is warranted among healthcare workers.     

Neonatal Acidemia with Trial of Labor Among Parturients with Prior Cesarean Delivery: A Case-Control Study

Objective: To determine the risk factors for neonatal acidemia with trial of labor among parturients with a prior cesarean delivery.

Methods: From a prospectively collected database on all parturients attempting a trial of labor, newborns with umbilical arterial pH <7.15 were selected as cases and the controls (1:4) were the next four patients who delivered nonacidotic (pH ≥7.15) neonates. Exclusion criteria were no prior cesarean delivery, anomalous fetus, and nonavailability of umbilical arterial blood gas analysis. Student's t-test, χ², and Fisher's exact tests were utilized and odds ratio (OR) and 95% confidence intervals (CI) were calculated. P < 0.05 was considered significant.

Results: The frequency of neonatal acidemia among patients undergoing trial of labor was 12% (28/234). The cases and controls (n = 112) were similar (P > 0.05) with regards to maternal age, frequency of more than one prior cesarean delivery (11% vs. 8%), gestational age, cervical exam on admission (3.0 ± 1.5 vs. 3.4 ± 1.7 cm), usage of oxytocin, and duration of first or second stage of labor. The mean birthweight was significantly higher among acidotic (3,758 ± 670 g) than nonacidotic (3,470 ± 545 g; P = 0.018) newborns. Compared to the controls, the cases had a significantly higher frequency of unsuccessful trial of labor (19% vs. 50%; OR: 4.09; 95% CI: 1.70, 9.82) and separation of the uterine scar (0.8% vs. 14%; OR: 18.50; 95% CI: 1.98, 173.05).

Conclusions: Acidotic newborns with trial of labor tend to be heavier. Parturients have a failed attempt at vaginal birth after cesarean, and have separation of the uterine scar during labor.     

Models for the prediction of successful induction of labor based on pre-induction sonographic measurement of cervical length

Objective.?To examine the effect of pre-induction cervical length, parity, gestational age at induction, maternal age and body mass index (BMI) on the possibility of successful delivery in women undergoing induction of labor.

Methods.?In 822 singleton pregnancies, induction of labor was carried out at 35 to 42^?+?6 weeks of gestation. The cervical length was measured by transvaginal sonography before induction. The effect of cervical length, parity, gestational age, maternal age and BMI on the interval between induction and vaginal delivery within 24?hours was investigated using Cox's proportional hazard model. The likelihood of vaginal delivery within 24?hours and risk for cesarean section overall and for failure to progress was investigated using logistic regression analysis.

Results.?Successful vaginal delivery within 24?hours of induction occurred in 530 (64.5%) of the 822 women. Cesarean sections were performed in 161 (19.6%) cases, 70 for fetal distress and 91 for failure to progress. Cox's proportional hazard model indicated that significant prediction of the induction-to-delivery interval was provided by the pre-induction cervical length (HR?=?0.89, 95 % CI 0.88–0.90, p?<?0.0001), parity (HR?=?2.39, 95% CI 1.98–2.88, p?<?0.0001), gestational age (HR?=?1.13, 95% CI 1.07–1.2, p?= <?0.0001) and birth weight percentile (HR?=?0.995, 95% CI 0.99?– 0.995, p?=?0.001), but not by maternal age or BMI. Logistic regression analysis indicated that significant prediction of the likelihood of vaginal delivery within 24?hours was provided by pre-induction cervical length (OR?=?0.86, 95% CI 0.84–0.88, p?<?0.0001), parity (OR?=?3.59, 95% CI 2.47–5.22, p?<?0.0001) and gestational age (OR =?1.19, 95% CI 1.07–1.32, p?= <?0.0001) but not by BMI or maternal age. The risk of cesarean section overall was significantly associated with all the variables under consideration, i.e., pre-induction cervical length (OR?=?1.09, 95% CI 1.06–1.11, p?<?0.0001), parity (OR?=?0.25, 95% CI 0.17–0.38, p?<?0.0001), BMI (OR?=?1.85, 95% CI 1.24–2.74, p?=?0.0024), gestational age (OR?=?0.88, 95% CI 0.78–0.98, p?=?0.0215) and maternal age (OR?=?1.04, 95% CI 1.01–1.07, p?=?0.0192). The risk of cesarean section for failure to progress was also significantly associated with pre-induction cervical length (OR?=?1.11, 95% CI 1.07–1.14, p?<?0.0001), parity (OR?=?0.26, 95% CI 0.15–0.43, p?<?0.0001), gestational age (OR?=?0.83, 95% CI 0.73–0.96, p?=?0.0097) and BMI (OR?=?2.07, 95% CI 1.27–3.37, p?=?0.0036).

Conclusion.?In women undergoing induction of labor, pre-induction cervical length, parity, gestational age at induction, maternal age and BMI have a significant effect on the interval between induction and delivery within 24?hours, likelihood of vaginal delivery within 24?hours and the risk of cesarean section.     

The impact of maternal epilepsy on perinatal outcome in singleton gestations

Objective: We sought to evaluate perinatal outcomes in women with epilepsy.

Methods: We performed a retrospective cohort study between 2007 and 2014, at a tertiary, university-affiliated medical center. All women with singleton gestation who delivered during the study period were included, except for pregnancies in which fetuses with chromosomal or structural anomalies were diagnosed. Perinatal outcome was compared between two groups: women diagnosed with epilepsy and women without epilepsy.

Results: Out of 62,102 deliveries during the study period, 61,455 met the inclusion criteria, of whom 206 (0.3%) had epilepsy. The only difference found in maternal demographics was higher rate of nulliparity in the epilepsy group (p?=?.02). As for maternal adverse outcome, higher rates of placental abruption and longer postpartum admission were found in women with epilepsy (p?=?.02 and p?p?p?=?.02), neonatal intensive care unit (NICU) admissions (OR 1.84, 95%CI 1.25–2.70, p?=?.002), seizures (OR 4.33, 95%CI 1.60–11.77, p?=?.004), transient tachypnea of the newborn (OR 2.47, 95%CI 1.005–6.05, p?=?.049) and respiratory distress syndrome (OR 7.16, 95%CI 2.47–20.76, p?Conclusions: Epilepsy in pregnant women is associated with adverse perinatal outcomes, including neonatal seizures, placental abruption and respiratory problems.     

Umbilical blood gas analysis in preeclamptic versus healthy pregnancies with preterm birth

Objective: Comparing the value of umbilical cord arterial blood gas (UC-ABG) analysis in the prediction of neonatal mortality and morbidity in the preeclamptic versus healthy pregnancies with preterm birth.

Methods: Eight hundred sixteen preterm (born at?<37 gestational weeks) neonates with no other morbidities who were born by cesarean section were evaluated. Immediately after delivery, UC-ABG analysis was performed and the neonates were followed.

Results: Preeclamptic women had lower umbilical cord blood (UCB) pH (7.2 4?±?0.1 versus 7.2 7?±?0.08, p?=?0.008) and higher UCB base deficit (BD) (3.5?±?3.7 versus 2.2?±?3.4, p?=?0.005) compared with controls. In the preeclamptic group, UCB metabolic acidosis (pH?<?7.15 and B.D?>?8) was not independently associated with neonatal morbidity or mortality, while in the control group UCB metabolic acidosis was independently associated with low 10-min Apgar (OR, 4.9; 95%CI 1.37–18.03), respiratory distress syndrome (OR, 2.37; 95%CI 1.05–6.17), intraventricular hemorrhage (OR, 3.01; 95%CI 1.13–7.99), and neonatal mortality (OR, 17.33; 95%CI 4.51–66.53).

Conclusions: The preterm neonates born to preeclamptic mothers have lower UCB pH and higher BD. In these neonates, UCB acidosis is not independently associated with any adverse neonatal outcomes. In contrast, in the preterm neonates born to healthy mothers, UCB metabolic acidosis is independently associated with neonatal mortality and morbidity.