Maternal and neonatal outcomes of placenta increta and percreta from a multicenter study in China

Objective: The objective of this study is to identify the maternal and neonatal outcomes in women with placenta increta or placenta percreta in China.

Materials and methods: We retrospectively analyzed 2219 cases from 20 tertiary care centers in China between January 2011 and December 2015. All cases were diagnosed of placenta increta or placenta percreta, based on either intraoperative findings or histopathological findings.

Results: The incidence of placenta increta and placenta percreta progressively increased from 0.18% in 2011 to 0.78% in 2015. Compared with the placenta increta, placenta percreta was strongly related to serious adverse outcomes: postpartum hemorrhage (65.9% versus 38.6%, p?=?.003), blood transfusion (86.2% versus 46.5%, p?p?p?p?Conclusion: The incidence of placenta increta and placenta percreta is likely to increase in China. The depth of placenta implantation is associated with the severity of outcomes. Placenta percreta tends to have worse maternal and neonatal outcomes.     

Meconium aspiration syndrome: risk factors and predictors of severity

Purpose: To identify risk factors and predictors of severity associated with meconium aspiration syndrome (MAS) in the patients admitted to the neonatal intensive care unit (NICU).

Materials and methods: Retrospective study including newborns admitted, between 2005 and 2015, with a diagnosis of MAS.

Results: Of the newborns admitted to the NICU, 0.66% were diagnosed with MAS. These had higher prevalence of caesarean delivery (p?p?p?=?.002), Apgar scores at the first minute <7 (p?p?p?=?.001) and 73.3% had pulmonary hypertension (p?=?.027). They required significantly more days of oxygen therapy, mechanical ventilation, nitric oxide, inotropic, and surfactant therapy, as well as longer hospital stay.

Conclusions: Nonreassuring or abnormal CTG and low Apgar score at the first minute were established as risk factors for MAS and need of surfactant therapy as a predictor of severity.     

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.     

Anesthesia management of complete versus incomplete placenta previa: a retrospective cohort study

Purpose: Placenta previa (PP) is a major cause of obstetric hemorrhage. Clinical diagnosis of complete versus incomplete PP has a significant impact on the peripartum outcome. Our study objective is to examine whether distinction between PP classifications effect anesthetic management.

Methods and materials: This multi-center, retrospective, cohort study was performed in two tertiary university-affiliated medical centers between the years 2005 and 2013. Electronic delivery databases were reviewed for demographic, anesthetic, obstetric hemorrhage, and postoperative outcomes for all cases.

Results: Throughout the study period 452 cases of PP were documented. We found 134 women (29.6%) had a complete PP and 318 (70.4%) had incomplete PP. Our main findings were that women with complete PP intraoperatively had higher incidence of general anesthesia (p?=?.017), higher mean estimated blood loss (p?p?p?p?p?=?.02), a longer median postoperative care unit (PACU) (p?=?.02), ICU (p?=?.002), and overall length of stay in the hospital (p?Conclusions: Complete PP is associated with increased risk of hemorrhage compared with incomplete PP. Therefore distinction between classifications should be factored into anesthetic management protocols.     

Maternal asthma: pregnancy course and outcome

Objective: To evaluate the association between maternal asthma and perinatal outcome.

Study design: In this retrospective population-based cohort study, all pregnancies between 1991 and 2014 in a tertiary medical center, were included. Multiple pregnancies and congenital malformations were excluded. Pregnancy course and outcomes were compared between women with and without asthma, and multivariable generalized estimating equations were used to control for confounders.

Results: During the study period, 243,363 deliveries met the inclusion criteria, 1.35% of which (n?=?3283) occurred in women diagnosed with asthma. Multiple perinatal complications were found to be associated with maternal asthma, including hypertensive disorders, preterm delivery, and cesarean delivery. However, no significant differences between the groups were noted in neonatal outcomes, including perinatal mortality rates and low Apgar scores. In the regression model, maternal asthma was noted as an independent risk factor for preterm delivery, hypertensive disorders of pregnancy, and cesarean delivery (aOR?=?1.21, 95%CI 1.1–1.4, p?=?.007; aOR?=?1.35, 95%CI 1.2–1.6, p?p?Conclusions: Maternal asthma is associated with an increased risk for adverse pregnancy outcome. This association remains significant while controlling for variables considered to coexist with maternal asthma. Nevertheless, perinatal outcome is generally favorable.     

Intrapartum fever and the risk for perinatal complications – the effect of fever duration and positive cultures

Objective: To estimate the association between intrapartum fever and adverse perinatal outcome.

Methods: A retrospective cohort study of women attempting vaginal delivery at term in a tertiary hospital (2012–2015). Perinatal outcome of deliveries complicated by intrapartum fever (≥38.0?°C) were compared to women with no intrapartum fever matched by parity and gestational age at delivery in a 1:2 ratio. Maternal outcome included cesarean section (CS), operative vaginal delivery (OVD), retained placenta or post-partum hemorrhage. Neonatal outcome included 5-minute Apgar score <7, umbilical artery pH <7.1, meconium aspiration syndrome, need for mechanical ventilation or hypoxic ischemic encephalopathy.

Results: Overall, 309 women had intrapartum fever and 618 served as controls. Women with intrapartum fever had higher rates of OVD (34.3 versus 19.6%, p?p?p?p?p?=?.01).

Conclusions: Intrapartum fever was associated with adverse perinatal complications. The duration of intrapartum fever, maternal bacteremia, and positive cultures further increase this risk.     

The association between maternal race and adverse outcomes in twin pregnancies with similar healthcare access

Objective: To compare twin pregnancy outcomes between white and nonwhite women with similar access to health care.

Methods: Retrospective cohort study of all twin pregnancies delivered by a single maternal–fetal medicine practice from 2005–2016. All patients had private health insurance and equal access to physician care. Outcomes were compared between white and nonwhite women using logistic regression to adjust for differences at baseline.

Results: Of the 858 women included, 730 (85.1%) were white and 128 (14.9%) were nonwhite. Univariate analysis demonstrated that nonwhite women had higher rates of preterm birth <32 weeks (12.5 versus 6.7%, p?=?.022), cesarean delivery (78.1% versus 61.4% of all women, p?p?p?=?.029) and gestational diabetes (23.2% versus 7.3%, p?Conclusions: Nonwhite women with twin pregnancies have an increased risk of adverse outcomes that cannot be explained by access to care. Although improving access to care is an important goal for health care systems, our data suggest that this alone will not eliminate all disparities in health care outcomes between women of different races.     

Induction of labor in cases of late preterm isolated oligohydramnios: is it justified?

Objectives: To analyze in a retrospective cohort study the outcomes of pregnancies with isolated oligohydramnios at the late preterm period (34–36.6 weeks of gestation).

Study design: This retrospective cohort study included three groups of women: (1) Women with isolated oligohydramnios whose pregnancy was managed conservatively (n?=?33 births); (2) women with isolated oligohydramnios who were managed actively (i.e. induction of labor) (n?=?111 births); and (3) a control group including women with normal amount of amniotic fluid who had a spontaneous late preterm delivery (n?=?10,445 births). Maternal and fetal characteristics and obstetrics outcomes were collected from a computerized database of all deliveries at Soroka University Medical Center during the study period.

Results: Our cohort included 10,589 births. The rate of inducing labor was higher in the oligohydramnios groups compared to the controls (p?p?p?=?.026), chorioamnionitis (p?=?.01), and transitory tachypnea of the newborn (p?=?.02). After controlling for confounding factors, mal presentation (OR?=?19.9), and a prior CS (OR?=?2.4) were independently associated with an increased risk for CS, while induction of labor was associated with a reduced risk for CS (OR?=?0.28).

Conclusions: Women with late preterm isolated oligohydramnios had a higher rate of induction of labor than women with a normal amount of amniotic fluid. Induction of labor seems to be beneficial to both the neonate and the mother as seen by a lower rate of CS conducted in this group, as well as lower maternal and neonatal morbidity in comparison to the conservative group. Therefore, women with oligohydramnios at late preterm may benefit from induction of labor.     

The clinical value of maternal and fetal Doppler parameters in low-risk postdates pregnancies – a prospective study

Objective: The objective of this study is to determine the clinical significance of maternal and fetal ultrasound Doppler flow indices in postdates pregnancies.

Methods: This prospective study comprised 120 low-risk pregnant women beyond 40 weeks of gestation. All participants underwent Doppler assessment including of fetal middle cerebral artery (MCA), umbilical, and uterine arteries. Perinatal outcomes were recorded and evaluated for possible associations with Doppler flow values. Adverse perinatal outcomes were defined as umbilical cord arterial pH <7.1, Apgar score <7 at 5?min, neonatal admission to a neonatal intensive care unit, and emergency cesarean section due to abnormal intrapartum cardiotocogram

Results: Adverse perinatal outcome rate was 17.5% (n?=?21). Doppler indices of umbilical artery, MCA, uterine artery and the cerebroplacental ratio (CPR) did not differ significantly between pregnant women with and without adverse perinatal outcomes. Neonatal birth weight was found to correlate negatively with umbilical artery Doppler indices, including the peak systolic to end diastolic ratio (p?=?.04), the resistance index (p?=?.02), and the pulsatility index (p?=?.01). Doppler values of the uterine artery, MCA and CPR did not correlate with neonatal birth weight.

Conclusions: The contribution of maternal and fetal ultrasound Doppler to the prediction of adverse perinatal outcomes in low-risk postdates pregnancies is low. Hence, performing routine Doppler examination as part of postdates pregnancy assessments is unlikely to yield significant clinical benefit.     

Sonographic assessment of the lower uterine segment during active labor in women with or without a uterine scar – a prospective study

Objectives: No study thus far has evaluated the LUS thickness in active labor. In this study, we endeavored to assess the LUS during active labor.

Methods: Using transabdominal sonography in the mid-sagittal position with a full urinary bladder, the thickness of the LUS was measured during active labor phase in women with or without a history of a previous cesarean section.

Results: A total of 28 women with a previous cesarean delivery were compared to 29 women without a history of uterine surgery. The median LUS was significantly thinner in women with a uterine scar both during (4 versus 5?mm, p?=?.001) and between contractions (5 versus 7?mm, p?=?.011). Paired comparison of LUS thickness between and during contractions within each group showed that thinning of LUS during contraction was significant for both the previous CS group (p?p?Conclusions: In this study, we characterized for the first time the LUS during active labor. We found that LUS was significantly thinner in women after a previous CS and that the LUS was significantly thinner during contraction.     

Targeted delivery at 34 versus 35 weeks in women with preterm prelabor rupture of membranes

Objective: To compare planned delivery at 34 versus 35 weeks for women with preterm prelabor rupture of membranes (PPROM).

Materials and methods: We performed a retrospective cohort study of singleton pregnancies with PPROM after 24 weeks delivered from 2006 to 2014. In 2009, an institutional practice change established 35 weeks as the target gestational age before induction of labor was initiated after PPROM. Demographic and outcome measures were compared for two cohorts: women delivered 2006–2008 – target 34 weeks (T34) and women delivered 2009–2014 – target 35 weeks (T35). The primary outcome was neonatal intensive care unit (NICU) admission.

Results: Of the 382 women with PPROM, 153 (40%) comprized the T34 cohort and 229 (60%) comprized the T35 cohort. Demographic characteristics were similar between groups. There were no differences between groups in gestational age at PPROM (31.0?±?3.3 weeks versus 31.2?±?3.1 weeks; p?=?.50) or maternal complications. The mean gestational age at delivery was earlier in the T34 group (31.8?±?3.2 weeks versus 32.4?±?2.7 weeks; p?=?.04). The median predelivery maternal length of stay (LOS) was 1?day longer in the T35 group (p?=?.03); the total and postpartum LOS were similar between groups (p?>?.05). There were no differences in the rate of NICU admission (T34 89.5% versus T35 92.1%; p?=?.38) or median neonatal LOS (T34 14 days versus T35 17 days; p?=?.15). In those patients who reached their target gestational age, both maternal predelivery LOS and total LOS were longer in the T35 group (p?>?.05). The frequency of NICU admission in those reaching their target gestational age was similar between groups (T34 83.37% versus T35 76.19%; p?=?.46).

Conclusions: A 35-week target for delivery timing for women with PPROM does not decrease NICU admissions or neonatal LOS. This institutional change increased maternal predelivery LOS, but did not increase maternal or neonatal complications.     

Trial of labor after cesarean versus repeat cesarean in women with small-for-gestational age neonates: a secondary analysis

Objective: The objective of this study was to determine whether trial of labor after cesarean (TOLAC) is associated with increased risk of adverse outcomes for small-for-gestational-age (SGA) neonates.

Methods: This secondary analysis of a multicenter prospective observational study evaluated SGA neonates born to women with a single prior cesarean delivery. Nonanomalous, singleton pregnancies delivered at 24–41 weeks were included. The primary exposure was whether women underwent planned cesarean versus attempted TOLAC. Log-linear regression models were developed to characterize the relationship between TOLAC and neonatal outcomes. The primary outcome was a composite measure of neonatal morbidity and/or mortality, including death, respiratory complications, treated hypoglycemia, sepsis, neonatal intensive care unit (NICU) admission and hospital stay?>5 days.

Results: Of 1009 patients identified, 258 underwent repeat cesarean; 751 attempted TOLAC. Controlling for age, race, body mass index, smoking, maternal disease, prior vaginal birth after cesarean, corticosteroids, prematurity and nonreassuring fetal status as indication for delivery, the composite adverse outcome was similarly likely in both groups (adjusted risk ratio (RR) 0.99, 95% confidence interval (95% CI) 0.88–1.12, p?=?0.93).

Conclusions: SGA infants born to women who TOLAC have similar neonatal outcomes to those who deliver by planned repeat cesarean. We conclude that TOLAC is an acceptable option for women with a prior cesarean and suspected SGA neonates.     

Improved pregnancy outcome following earlier splenectomy in women with immune thrombocytopenia: a 5-year observational study

Objective: To assess prospectively the maternal and fetal outcome in women with immune thrombocytopenic purpura (ITP) who undergone earlier splenectomy compared to women on medical therapy.

Methods: A 5-year observational study included pregnant women in the first trimester previously diagnosed with primary ITP with 74 patients underwent splenectomy before pregnancy and 86 patients on medical therapy. Patients were followed throughout pregnancy and labour to record their obstetric outcome. Data were collected and tabulated.

Results: There was a higher platelet count in the splenectomy group at enrollment (p?p?p?p?p?p?p?p?p?Conclusion: Earlier splenectomy in patients with ITP may have a beneficial impact on obstetric outcome and should be explained to patients wishing to get pregnant. Further larger multicenter studies are warranted to confirm or refute our findings.     

Maternal medical compromise during pregnancy and pregnancy outcomes

Objective: To examine the outcomes of pregnancy and newborn following an event of maternal medical compromise during pregnancy.

Methods: A retrospective study was performed on all patients hospitalized following an event of medical compromise during pregnancy. Medical compromise was divided to acute or chronic bleeding, major or complicated operations, and admission to intensive care unit (ICU). Data collected included maternal, fetal, neonatal and child’s follow-up.

Results: The study included 51 pregnant patients and 58 fetuses. The study group had increased risk of preterm deliveries (35.0 versus 6.5%, p?p?p?=?0.002). Patients with acute bleeding had higher rates of cesarean sections, preterm deliveries, admissions to neonatal ICU and neonatal mortality. Two cases of fetal abnormalities included brain abnormalities and pericardial effusion. Three terminations of pregnancies were performed: two in patients in ICU due to severe maternal medical condition and one in the fetus with brain abnormalities.

Conclusions: Maternal medical compromise during pregnancy increases the risk for preterm deliveries, cesarean delivery and low Apgar scores. Acute bleeding was the main cause of medical compromised and with the higher rates of adverse outcomes.     

Obstetric outcome associated with trial of labor in women with three prior cesarean delivery and at least one prior vaginal birth in an area with a particularly high rate of cesarean delivery

Objective: The objective of this study is to evaluate maternal and neonatal outcomes associated with trial of labor after cesarean (TOLAC) in women with three prior cesarean delivery (CD) and at least one prior vaginal delivery.

Methods: This is a retrospective study using data collected from clinical records of women three prior CD and at least one prior vaginal delivery who were referred to our unit. Maternal and perinatal outcomes were compared between women with three prior CD who underwent TOLAC and those who underwent planned repeated CD (i.e. control group). The primary outcome was a composite of maternal complications including at least one of the followings: need for blood transfusion, uterine rupture, hysterectomy, and admission to intensive care unit.

Results: Fifty singleton gestations with three prior CD at with at least one prior vaginal birth were analyzed. Of them, 10 accepted to undergo TOLAC. Of the 10 women who underwent TOLAC, nine had vaginal birth and one had CD for non-reassuring pattern. We found no significant differences in the primary outcome, in need for blood transfusion, in the incidence of uterine rupture, hysterectomy, and admission to intensive care unit comparing TOLAC group with controls.

Conclusion: TOLAC in women with three prior CD and at least one prior vaginal delivery is a viable option and is not associated with higher risk of adverse maternal or fetal outcomes.     

Maternal and neonatal outcomes among scheduled versus unscheduled deliveries in women with prenatally diagnosed,pathologically proven placenta accreta

Objective: To evaluate maternal and neonatal outcomes among scheduled versus unscheduled deliveries in cases of prenatally diagnosed, pathologically proven placenta accreta.

Study design: Retrospective cohort of placenta accreta cases delivered in five University of California hospitals.

Results: Of 151 cases of histopathologically proven placenta accreta, 82% were prenatally diagnosed. Sixty-seven percent of women underwent scheduled deliveries and 33% were unscheduled. There were no differences in demographics between groups except a higher rate of antepartum bleeding in the unscheduled delivery group (81 versus 53%; p?=?.003). Scheduled deliveries were associated with a later gestational age at delivery (34.6 versus 32.6 weeks; p?=?.001), lower blood loss (2.0 versus 2.5?l; p?=?.04), higher birth weight (2488 versus 2010?g; p?p?=?.03) and neonatal length of stay (12 versus 20 d; p?=?.005).

Conclusion: Despite a prenatal diagnosis of placenta accreta, 1/3 of these cases require unscheduled delivery, portending poorer maternal and neonatal outcomes.     

The effects of maternal obesity on perinatal outcomes among those born small for gestational age*

Background: Maternal obesity has been associated with higher birth weight. Small for gestational age (SGA) neonates born to obese women may be associated with pathological growth with increased neonatal complications.

Methods: This was a retrospective cohort study of all non-anomalous singleton neonates born in Texas from 2006–2011. Analyses were limited to births between 34 and 42 weeks gestation with birth weight?≤10th percentile. Results were stratified by maternal pre-pregnancy BMI class. The risk for stillbirth, neonatal death, neonatal intensive care unit (NICU) admission and five?minute Apgar scores?<7 were estimated for each obesity class and compared to the normal weight group. Multivariable logistic regression analyses were performed to control for potential confounding variables.

Results: The rate of stillbirth was 1.4/1000 births for normal weight women, and 2.9/1000 among obese women (p?0.001, aOR: 1.83 [1.43, 2.34]). The rate of neonatal deaths among normal weight women was 4.3/1000 births, whereas among obese women it was 4.7/1000 (p?=?0.94, aOR: 1.10 [0.92, 1.30]). A dose-dependent relationship between maternal obesity and stillbirths was seen, but not for other neonatal outcomes.

Conclusion: Among SGA neonates, maternal pre-pregnancy obesity was associated with increased risks for stillbirth, NICU admission and low Apgar scores but not neonatal death.     

Evaluation of outcomes associated with trial of labor after cesarean delivery after a change in clinical practice guidelines in an academic hospital

Objective: To evaluate maternal–neonatal morbidity for women undergoing trial of labor after cesarean (TOLAC) following clinical practice changes based upon ACOG’s 2010 VBAC guideline.

Study design: Four-year retrospective cohort analysis around implementation of a hospital guideline in women undergoing TOLAC with a live, cephalic, singleton without lethal anomaly ≥24 weeks and ≥1 prior cesarean. Maternal–neonatal outcomes pre- and post-guideline implementation were compared. Primary outcome was composite maternal morbidity (uterine rupture or dehiscence, hysterectomy, transfusion, thromboembolism, operative/delivery injury, chorioamnionitis/endometritis, shoulder dystocia, death). Secondary outcomes included neonatal morbidity.

Results: Four hundred and fifty women underwent TOLAC before and 781 after guideline implementation. Post-guideline, there was a significant increase in age, body mass index, labor length, women with >1 cesarean, comorbid condition and induced labor. Composite maternal morbidity was significantly higher after the guideline (13.78% versus 18.82%, p?=?0.02), possibly due to an increased rate of chorioamnionitis/endometritis, which was no longer significant after control for potential confounders in multivariable analysis. There were no differences in neonatal outcomes. Vaginal birth after cesarean (VBAC) success rates were unchanged (78.9% before versus 78.1% after, p?=?0.75), however hospital VBAC rates increased after the guideline (26% versus 33%, p?Conclusions: Adoption of ACOG’s TOLAC practice changes can increase VBAC rates without increasing maternal–neonatal morbidity from TOLAC.     

Small-for-gestational-age babies of low-risk term pregnancies: does antenatal detection matter?

Objectives: To compare delivery route and admission rate to neonatal intensive care unit between small- and appropriate-for-gestational-age babies among low-risk term pregnancies.

Methods: A retrospective study was conducted using the database of deliveries in 2014 at a tertiary hospital. Babies delivered at ≥37?weeks with birthweight <10th centile were considered small-for-gestational-age (SGA) and >90th centile were considered large-for-gestational-age. Fetal weight estimation at 30–33 weeks ultrasound <10th centile was considered antenatal detection of SGA.

Results: Among 1429 low-risk term pregnancies, 11% (151/1429) had SGA babies and 5% (75/1429) had large-for-gestational-age. SGA babies were associated with higher rate of cesarean sections for nonreassuring fetal status (18/151 versus 8/1202, p?p?p?=?.01)

Conclusions: In our series, women with SGA term babies were associated with more adverse obstetric and neonatal outcome than appropriate-for-gestational age, especially among those undetected prenatally.